Dyes and Pigments最新文献

英文中文

Thermally activated delayed fluorescence emitters with oxygen-bridged triarylborane acceptors for pure blue organic light emitting diodes

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-12-12 DOI: 10.1016/j.dyepig.2024.112597

Hai-Xiao Jiang , Yue-Jian Yang , Shi-Jie Ge , Jian-Rong Wu , Qi Zheng , Aziz Khan , Zuo-Quan Jiang , Yan-Qiu Sun

Two donor-acceptor (D-A) type pure blue thermally activated delayed fluorescent (TADF) emitters have been synthesized by integrating two oxygen-bridged triarylborane acceptors with different phenyl rings substitution sites with 10,10-diphenyl-5,10-dihydrodibenzo[b,e][1,4]azetidine (PASi). These emitters successfully keep the rapid reverse intersystem crossing rates characteristic of D-A type TADF materials, while incorporating the short-range charge transfer (SRCT) properties of oxygen-bridged triarylborane acceptors to amplify non-radiative transition processes. Organic light-emitting diode (OLED) devices based on these pure blue emitters show that each maximum external quantum efficiency (EQE_max) of the pPhBO-PASi and mPhBO-PASi devices are 20.4 % and 15.3 %, respectively. More encouragingly, the efficiency roll-off of the device improves with the increase of doping concentration. This work provides a simple and feasible molecular design strategy to design pure blue TADF emitters.

{"title":"Thermally activated delayed fluorescence emitters with oxygen-bridged triarylborane acceptors for pure blue organic light emitting diodes","authors":"Hai-Xiao Jiang , Yue-Jian Yang , Shi-Jie Ge , Jian-Rong Wu , Qi Zheng , Aziz Khan , Zuo-Quan Jiang , Yan-Qiu Sun","doi":"10.1016/j.dyepig.2024.112597","DOIUrl":"10.1016/j.dyepig.2024.112597","url":null,"abstract":"<div><div>Two donor-acceptor (D-A) type pure blue thermally activated delayed fluorescent (TADF) emitters have been synthesized by integrating two oxygen-bridged triarylborane acceptors with different phenyl rings substitution sites with 10,10-diphenyl-5,10-dihydrodibenzo[<em>b</em>,<em>e</em>][1,4]azetidine (<strong>PASi</strong>). These emitters successfully keep the rapid reverse intersystem crossing rates characteristic of D-A type TADF materials, while incorporating the short-range charge transfer (SRCT) properties of oxygen-bridged triarylborane acceptors to amplify non-radiative transition processes. Organic light-emitting diode (OLED) devices based on these pure blue emitters show that each maximum external quantum efficiency (EQE<sub>max</sub>) of the <strong>pPhBO-PASi</strong> and <strong>mPhBO-PASi</strong> devices are 20.4 % and 15.3 %, respectively. More encouragingly, the efficiency roll-off of the device improves with the increase of doping concentration. This work provides a simple and feasible molecular design strategy to design pure blue TADF emitters.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"235 ","pages":"Article 112597"},"PeriodicalIF":4.1,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highly efficient pyrene-based blue emitters utilizing optimized side groups

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-12-12 DOI: 10.1016/j.dyepig.2024.112596

Saeyoung Oh , Hyocheol Jung , Sangwook Park , Suhyeon Jeong , Kiho Lee , Young Il Park , Hayoon Lee , Jongwook Park

We designed and synthesized two blue fluorescent dopants, 3,8-diisopropyl-N1, N6-diphenyl-N1,N6-bis(8-phenyldibenzo [b,d]furan-2-yl)pyrene-1,6-diamine (DBF-DIP) and N1-(dibenzo [b,d]thiophen-2-yl)-3,8-diisopropyl-N1,N6-diphenyl-N6-(8-phenyldibenzo [b,d]thiophen-2-yl)pyrene-1,6-diamine (DBT-DIP), by introducing dibenzofuran and dibenzothiophene side groups, based on pyrene core chromophore. The synthesized two compounds, DBF-DIP and DBT-DIP, exhibited decomposition temperatures (T_d) of 496 °C and 505 °C, respectively, along with glass transition temperatures (T_g) of 170 °C and 174 °C, indicating their excellent thermal stability. When used as dopants in OLED devices, both DBF-DIP and DBT-DIP exhibited an excellent electroluminescent (EL) device performances with current efficiencies (CE) of over 10 cd/A. Especially, the DBT-DIP device demonstrated a maximum external quantum efficiency of 8.25 % and CE of 11.2 cd/A at 10 mA/cm².

{"title":"Highly efficient pyrene-based blue emitters utilizing optimized side groups","authors":"Saeyoung Oh , Hyocheol Jung , Sangwook Park , Suhyeon Jeong , Kiho Lee , Young Il Park , Hayoon Lee , Jongwook Park","doi":"10.1016/j.dyepig.2024.112596","DOIUrl":"10.1016/j.dyepig.2024.112596","url":null,"abstract":"<div><div>We designed and synthesized two blue fluorescent dopants, 3,8-diisopropyl-N1, N6-diphenyl-N1,N6-bis(8-phenyldibenzo [<em>b</em>,<em>d</em>]furan-2-yl)pyrene-1,6-diamine (DBF-DIP) and N1-(dibenzo [<em>b</em>,<em>d</em>]thiophen-2-yl)-3,8-diisopropyl-N1,N6-diphenyl-N6-(8-phenyldibenzo [<em>b</em>,<em>d</em>]thiophen-2-yl)pyrene-1,6-diamine (DBT-DIP), by introducing dibenzofuran and dibenzothiophene side groups, based on pyrene core chromophore. The synthesized two compounds, DBF-DIP and DBT-DIP, exhibited decomposition temperatures (T<sub>d</sub>) of 496 °C and 505 °C, respectively, along with glass transition temperatures (T<sub>g</sub>) of 170 °C and 174 °C, indicating their excellent thermal stability. When used as dopants in OLED devices, both DBF-DIP and DBT-DIP exhibited an excellent electroluminescent (EL) device performances with current efficiencies (CE) of over 10 cd/A. Especially, the DBT-DIP device demonstrated a maximum external quantum efficiency of 8.25 % and CE of 11.2 cd/A at 10 mA/cm<sup>2</sup>.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"235 ","pages":"Article 112596"},"PeriodicalIF":4.1,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multifunctional electroluminescence materials with aggregation-induced emission properties and reversible mechanoluminescence

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-12-12 DOI: 10.1016/j.dyepig.2024.112594

Yuanyuan Fang , Keyue Xu , Danfeng He , Wei Sun , Wenjing Xiong

Herein, the design and synthesis of blue luminogens (t-BuTPAniq and t-BuTPA2niq) were reported, which employed 4-(tert-butyl)-N-(4-(tert-butyl)(5-phenyl)-N-phenylaniline (t-BuTPA) as the electron donor (D) and isoquinoline (iq) as the electron acceptor (A), linking via naphthalene π-bridges. In toluene solution, t-BuTPAniq and t-BuTPA2niq exhibited emission wavelengths (λ_max) of 462 nm and 454 nm, with photoluminescent quantum yields (PLQY) of 34 % and 38 %, respectively. Notably, t-BuTPAniq presented a PLQY of 71 % and t-BuTPA2niq showed a PLQY of 79 % in neat film, indicating that these two complexes might display aggregation-induced emission (AIE) characteristics. In dichloromethane solution, the photoluminescence lifetimes of t-BuTPAniq and t-BuTPA2niq were 61.9 ns and 67.9 ns at room temperature, respectively. Futhermore, the experiments proved that these molecules possessed distinct AIE characteristics and reversible mechanical chromic properties. Their notable acid-base color-changing capabilities were advantageous for applications in fluorescence anti-counterfeiting. Organic light-emitting devices (OLEDs) fabricated with t-BuTPAniq and t-BuTPA2niq exhibited blue electroluminescence with emission peaks at 472 nm, achieving maximum external quantum efficiencies (EQEs) of 4.0 % and 3.6 %, respectively. In summary, these molecules presented a novel research direction for developing multifunctional blue electroluminescent materials, indicating significant potential for applications in displays, lighting technologies, and fluorescence anti-counterfeiting.

{"title":"Multifunctional electroluminescence materials with aggregation-induced emission properties and reversible mechanoluminescence","authors":"Yuanyuan Fang , Keyue Xu , Danfeng He , Wei Sun , Wenjing Xiong","doi":"10.1016/j.dyepig.2024.112594","DOIUrl":"10.1016/j.dyepig.2024.112594","url":null,"abstract":"<div><div>Herein, the design and synthesis of blue luminogens (<strong>t-BuTPAniq and t-BuTPA2niq</strong>) were reported, which employed 4-(<em>tert</em>-butyl)-<em>N</em>-(4-(<em>tert</em>-butyl)(5-phenyl)-<em>N</em>-phenylaniline (t-BuTPA) as the electron donor (D) and isoquinoline (iq) as the electron acceptor (A), linking via naphthalene π-bridges. In toluene solution, <strong>t-BuTPAniq</strong> and <strong>t-BuTPA2niq</strong> exhibited emission wavelengths (<em>λ<sub>max</sub></em>) of 462 nm and 454 nm, with photoluminescent quantum yields (PLQY) of 34 % and 38 %, respectively. Notably, <strong>t-BuTPAniq</strong> presented a PLQY of 71 % and <strong>t-BuTPA2niq</strong> showed a PLQY of 79 % in neat film, indicating that these two complexes might display aggregation-induced emission (AIE) characteristics. In dichloromethane solution, the photoluminescence lifetimes of <strong>t-BuTPAniq</strong> and <strong>t-BuTPA2niq</strong> were 61.9 ns and 67.9 ns at room temperature, respectively. Futhermore, the experiments proved that these molecules possessed distinct AIE characteristics and reversible mechanical chromic properties. Their notable acid-base color-changing capabilities were advantageous for applications in fluorescence anti-counterfeiting. Organic light-emitting devices (OLEDs) fabricated with <strong>t-BuTPAniq</strong> and <strong>t-BuTPA2niq</strong> exhibited blue electroluminescence with emission peaks at 472 nm, achieving maximum external quantum efficiencies (<em>EQE</em>s) of 4.0 % and 3.6 %, respectively. In summary, these molecules presented a novel research direction for developing multifunctional blue electroluminescent materials, indicating significant potential for applications in displays, lighting technologies, and fluorescence anti-counterfeiting.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"235 ","pages":"Article 112594"},"PeriodicalIF":4.1,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hybridized local and charge-transfer phosphafluorene oxide-based emitter for efficient nondoped blue organic light-emitting devices

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-12-12 DOI: 10.1016/j.dyepig.2024.112587

Longjiang Xing , Yukang Li , Qisheng Chen , Bo Liu , Zhiyu Deng , Shaomin Ji , Qian Chen , Qingdan Yang , Zecong Ye , Zhiheng Wang , Hai Bi , Yue Wang , Yanping Huo , Wen-Cheng Chen

The aryl phosphine oxide (APO) groups have been widely studied as host materials in organic light-emitting diodes (OLEDs). However, their application as emissive materials has been rarely explored, especially in the preparation of nondoped devices. In this work, two hybridized local and charge-transfer (HLCT) molecules, 2tBuCz-APO and 2TPA-APO, are developed by incorporating the donor groups tert-butylcarbazole (tCz) and diphenylamine (DPA) into phosphafluorene oxide unit. The experimental results demonstrate that phosphafluorene oxide derivatives exhibit HLCT characteristics, marking the first time that HLCT characteristics have been realized based on APO. As a result, the nondoped OLED based on 2tBuCz-APO exhibits the best performance with an excellent maximum external quantum efficiency (EQE_max) of 7.3 % and Commission Internationale de l’Éclairage (CIE) coordinates of (0.14, 0.15). This molecular design strategy has demonstrated that phosphine oxide, as an acceptor unit, shows promising potential for the development of highly efficient nondoped OLEDs.

{"title":"Hybridized local and charge-transfer phosphafluorene oxide-based emitter for efficient nondoped blue organic light-emitting devices","authors":"Longjiang Xing , Yukang Li , Qisheng Chen , Bo Liu , Zhiyu Deng , Shaomin Ji , Qian Chen , Qingdan Yang , Zecong Ye , Zhiheng Wang , Hai Bi , Yue Wang , Yanping Huo , Wen-Cheng Chen","doi":"10.1016/j.dyepig.2024.112587","DOIUrl":"10.1016/j.dyepig.2024.112587","url":null,"abstract":"<div><div>The aryl phosphine oxide (APO) groups have been widely studied as host materials in organic light-emitting diodes (OLEDs). However, their application as emissive materials has been rarely explored, especially in the preparation of nondoped devices. In this work, two hybridized local and charge-transfer (HLCT) molecules, <strong>2<em>t</em>BuCz-APO</strong> and <strong>2TPA-APO</strong>, are developed by incorporating the donor groups <em>tert</em>-butylcarbazole (<em>t</em>Cz) and diphenylamine (DPA) into phosphafluorene oxide unit. The experimental results demonstrate that phosphafluorene oxide derivatives exhibit HLCT characteristics, marking the first time that HLCT characteristics have been realized based on APO. As a result, the nondoped OLED based on <strong>2<em>t</em>BuCz-APO</strong> exhibits the best performance with an excellent maximum external quantum efficiency (EQE<sub>max</sub>) of 7.3 % and Commission Internationale de l’Éclairage (CIE) coordinates of (0.14, 0.15). This molecular design strategy has demonstrated that phosphine oxide, as an acceptor unit, shows promising potential for the development of highly efficient nondoped OLEDs.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"235 ","pages":"Article 112587"},"PeriodicalIF":4.1,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advanced photonic circuits using a mechanofluorochromic diketopyrrolopyrrole derivative

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-12-09 DOI: 10.1016/j.dyepig.2024.112593

Abelardo Sánchez-Oliva , Carlos Tardío , Esther Pinilla-Peñalver , Basanta Saikia , Iván Torres-Moya

This study explores, for the first time, the use of a diketopyrrolopyrrole (DPP) derivative as an optical waveguide for the fabrication of photonic circuits, where light transmission in different directions is possible depending on the excitation point. This is a key factor in the development of a new generation of miniaturized and versatile photonic chips. The DPP core was chosen for its thermal stability and exceptional optical properties, which are crucial for efficient light transmission in photonic devices, with a particular emphasis on the high fluorescence of the described derivative. Additionally, this compound exhibited a mechanofluorochromic response to mechanical stimuli. The reversible transition between different phases, along with its light-guiding capabilities, presents significant potential for practical applications, including security inks, rewritable materials, and advanced optical technologies.

引用次数: 0

PVP formulations of bis-cyclometalated iridium(III) complexes bearing β-modified porphyrin ligands: Characterization and photodynamic action on bladder cancer cells

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-12-08 DOI: 10.1016/j.dyepig.2024.112580

Nuno M.M. Moura , Melani J.A. Reis , Carlos Lodeiro , M. Graça P.M. S. Neves , José A.S. Cavaleiro , Carlos F. Ribeiro , Rosa Fernandes , Ana T.P.C. Gomes

Cancer stands as the second leading global cause of death, following heart disease. Considering the severe side effects revealed by some chemotherapeutics for tumor treatment and anticancer therapies, the scientific community is actively exploring more effective alternatives. Photodynamic Therapy (PDT) mediated by porphyrin-based photosensitizers (PS) has emerged as an attractive alternative to more conventional therapies. In this study, we incorporated bis-cyclometalated iridium(III) complexes featuring porphyrin-arylbipyridine ligands into poly(vinylpyrrolidone) (PVP) micelle. This integration resulted in photostable PVP-PS formulations with a remarkable capability to generate singlet oxygen. These formulations were also efficiently internalized by HT-1379 cells and due to these features, their photodynamic action against human bladder cancer cells (HT-1376 cell line) was assessed. All the formulations demonstrated high photodynamic activity, with PVP-2 and PVP-3 proving to be the most promising PS, as evidenced by their lower IC50_PDT values. It was also demonstrated that all PVP-based formulations provide a safe and effective approach for photodynamic therapy (PDT) in bladder cancer, as no cytotoxic effects were observed in Vero cells.

{"title":"PVP formulations of bis-cyclometalated iridium(III) complexes bearing β-modified porphyrin ligands: Characterization and photodynamic action on bladder cancer cells","authors":"Nuno M.M. Moura , Melani J.A. Reis , Carlos Lodeiro , M. Graça P.M. S. Neves , José A.S. Cavaleiro , Carlos F. Ribeiro , Rosa Fernandes , Ana T.P.C. Gomes","doi":"10.1016/j.dyepig.2024.112580","DOIUrl":"10.1016/j.dyepig.2024.112580","url":null,"abstract":"<div><div>Cancer stands as the second leading global cause of death, following heart disease. Considering the severe side effects revealed by some chemotherapeutics for tumor treatment and anticancer therapies, the scientific community is actively exploring more effective alternatives. Photodynamic Therapy (PDT) mediated by porphyrin-based photosensitizers (PS) has emerged as an attractive alternative to more conventional therapies. In this study, we incorporated bis-cyclometalated iridium(III) complexes featuring porphyrin-arylbipyridine ligands into poly(vinylpyrrolidone) (PVP) micelle. This integration resulted in photostable PVP-PS formulations with a remarkable capability to generate singlet oxygen. These formulations were also efficiently internalized by HT-1379 cells and due to these features, their photodynamic action against human bladder cancer cells (HT-1376 cell line) was assessed. All the formulations demonstrated high photodynamic activity, with <strong>PVP-2</strong> and <strong>PVP-3</strong> proving to be the most promising PS, as evidenced by their lower IC50<sub>PDT</sub> values. It was also demonstrated that all PVP-based formulations provide a safe and effective approach for photodynamic therapy (PDT) in bladder cancer, as no cytotoxic effects were observed in Vero cells.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"235 ","pages":"Article 112580"},"PeriodicalIF":4.1,"publicationDate":"2024-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Indirubin-incorporated biodegradable PHB microbeads and its application for functional facial cleanser

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-12-07 DOI: 10.1016/j.dyepig.2024.112586

Yura Choi , Kwon-Young Choi

In this study, we report the production of biodegradable microbeads using the poly [(R)-3-hydroxybutyric acid] (PHB) polymer. To introduce functionality, we engineered Escherichia coli strains to produce biodegradable PHB by expressing indole oxidase, enabling the synthesis of biodegradable polymers containing either indigo or indirubin. The formation of indigo or indirubin or both is dictated by the symmetrical or asymmetrical dimerization of oxidized indole products, which depends on the specific oxidation position. To increase the content of indirubin—a compound with known anticancer properties—relative to indigo (commonly used as a dye for denim), isatin was supplied during synthesis. This approach yielded indirubin-PHB biodegradable films with enhanced indirubin content. Furthermore, during the film fabrication process, photodegradation of indigo was induced, further enriching the relative indirubin content ratio. Using these indirubin-PHB films, biodegradable microbeads with diameters below 200 μm was successfully produced. Characterization of these microbeads confirmed the incorporation of indirubin, resulting in functional biodegradable microbeads. Finally, a prototype facial cleanser containing indirubin-PHB microbeads was developed, suggesting the potential of these eco-friendly microbeads as cosmetic ingredients for future applications.

{"title":"Indirubin-incorporated biodegradable PHB microbeads and its application for functional facial cleanser","authors":"Yura Choi , Kwon-Young Choi","doi":"10.1016/j.dyepig.2024.112586","DOIUrl":"10.1016/j.dyepig.2024.112586","url":null,"abstract":"<div><div>In this study, we report the production of biodegradable microbeads using the poly [(R)-3-hydroxybutyric acid] (PHB) polymer. To introduce functionality, we engineered <em>Escherichia coli</em> strains to produce biodegradable PHB by expressing indole oxidase, enabling the synthesis of biodegradable polymers containing either indigo or indirubin. The formation of indigo or indirubin or both is dictated by the symmetrical or asymmetrical dimerization of oxidized indole products, which depends on the specific oxidation position. To increase the content of indirubin—a compound with known anticancer properties—relative to indigo (commonly used as a dye for denim), isatin was supplied during synthesis. This approach yielded indirubin-PHB biodegradable films with enhanced indirubin content. Furthermore, during the film fabrication process, photodegradation of indigo was induced, further enriching the relative indirubin content ratio. Using these indirubin-PHB films, biodegradable microbeads with diameters below 200 μm was successfully produced. Characterization of these microbeads confirmed the incorporation of indirubin, resulting in functional biodegradable microbeads. Finally, a prototype facial cleanser containing indirubin-PHB microbeads was developed, suggesting the potential of these eco-friendly microbeads as cosmetic ingredients for future applications.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"235 ","pages":"Article 112586"},"PeriodicalIF":4.1,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143134910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CIELAB substrate and ink parameters influence on ink fluorescence intensity

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-12-06 DOI: 10.1016/j.dyepig.2024.112588

Marta Gajadhur

The article presents the illuminance of eight fluorescent inks in the context of colour CIELAB parameters. The tested fluorescent inks include the most commonly used colors in the white light spectrum, from blue-violet to intense orange. These inks contain 30 % of fluorescent pigments. The illuminance analysis of the ink films covers a wide range of ink layer thicknesses, the type of substrate (without and with optical brighteners), and the substrate CIELAB lightness from white to black used to obtain prints. The article derives the dependencies of the ink illuminance excited by UV radiation on CIELAB parameters, including the lightness of the substrate (L∗_s), the lightness of the fluorescent ink layer (L∗_ink), and the a∗ and b∗ parameters in the CIELAB space. In all cases, these dependencies have the nature of an exponential function and significantly impact the fluorescent effect. The novelty of the presented results is the possibility of an appropriate selection of the thickness of the ink layer, the ink colour, the substrate, and the substrate lightness to obtain desired ink illuminance. The research results may find application in many industries where fluorescent inks are used, particularly in the case of evacuation routes, safety signs, security printing, and various types of sensors.

{"title":"CIELAB substrate and ink parameters influence on ink fluorescence intensity","authors":"Marta Gajadhur","doi":"10.1016/j.dyepig.2024.112588","DOIUrl":"10.1016/j.dyepig.2024.112588","url":null,"abstract":"<div><div>The article presents the illuminance of eight fluorescent inks in the context of colour CIELAB parameters. The tested fluorescent inks include the most commonly used colors in the white light spectrum, from blue-violet to intense orange. These inks contain 30 % of fluorescent pigments. The illuminance analysis of the ink films covers a wide range of ink layer thicknesses, the type of substrate (without and with optical brighteners), and the substrate CIELAB lightness from white to black used to obtain prints. The article derives the dependencies of the ink illuminance excited by UV radiation on CIELAB parameters, including the lightness of the substrate (L∗<sub>s</sub>), the lightness of the fluorescent ink layer (L∗<sub>ink</sub>), and the a∗ and b∗ parameters in the CIELAB space. In all cases, these dependencies have the nature of an exponential function and significantly impact the fluorescent effect. The novelty of the presented results is the possibility of an appropriate selection of the thickness of the ink layer, the ink colour, the substrate, and the substrate lightness to obtain desired ink illuminance. The research results may find application in many industries where fluorescent inks are used, particularly in the case of evacuation routes, safety signs, security printing, and various types of sensors.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"235 ","pages":"Article 112588"},"PeriodicalIF":4.1,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143134865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Scalable fabrication and characterization of high refractive index luminescent dye-doped polymer films for planar waveguides and thermal imprint

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-12-06 DOI: 10.1016/j.dyepig.2024.112591

Ł. Duda , M. Czajkowski , M. Guzik

Polymer films with high refractive index (RI) and doped with luminescent dyes enable the generation of light inside the waveguiding film without any additional complex light coupling techniques. However, some luminescent dyes may tend to aggregate in polymer matrices, which may lead to a reduction in the luminescence efficiency. Therefore, the mutual compatibility between various dyes and high-RI matrices as well as the fabrication technology are crucial in the manufacturing of photonic devices.

This study presents the fabrication via dip-coating method and comprehensive characterization of formable polymer films including dye-doped ones, for planar waveguides. Using this cost-effective and easy-to-scale-up technique it was possible to obtain polystyrene (PS), poly(benzyl methacrylate) (PBzMA), polycarbonate (PC), and polysulfone (PSU) homogenous undoped films on soda-lime glass substrates. The thickness of the obtained layers was in the sub-micrometric range, and their RI was in the range of 1.56–1.62, which was determined using profilometry and spectroscopic ellipsometry. Numerical calculations confirmed that the films fabricated on soda-lime glass substrates meet the criteria to work as planar waveguides. Moreover, the structurization of the polymer films using the thermal nanoimprint lithography (TNIL) technique in the temperature range of 80–200 °C was presented, revealing the highest processing temperature for the PSU films and the lowest one for the PBzMA films.

High RI PSU films doped with eleven different luminescent organic dyes, exhibiting emissions spanning the entire visible spectral range, were successfully fabricated. Spectroscopic techniques such as absorption, excitation, and emission measurements were used to characterize their luminescent properties. Moreover, a dye exhibiting solvatochromism (Nile Red – NR), and a dye showing a tendency for aggregation (Rhodamine 6G – Rh6G) were investigated in all the studied polymer matrices. Among all the examined polymers, PSU was the most polar and caused the lowest luminescence quenching of the Rh6G dye, having simultaneously the highest RI (1.62). We anticipate that the fabricated films could be used in planar photonic systems as waveguiding films, in light amplification systems, or as solar cell concentrators.

{"title":"Scalable fabrication and characterization of high refractive index luminescent dye-doped polymer films for planar waveguides and thermal imprint","authors":"Ł. Duda , M. Czajkowski , M. Guzik","doi":"10.1016/j.dyepig.2024.112591","DOIUrl":"10.1016/j.dyepig.2024.112591","url":null,"abstract":"<div><div>Polymer films with high refractive index (RI) and doped with luminescent dyes enable the generation of light inside the waveguiding film without any additional complex light coupling techniques. However, some luminescent dyes may tend to aggregate in polymer matrices, which may lead to a reduction in the luminescence efficiency. Therefore, the mutual compatibility between various dyes and high-RI matrices as well as the fabrication technology are crucial in the manufacturing of photonic devices.</div><div>This study presents the fabrication <em>via</em> dip-coating method and comprehensive characterization of formable polymer films including dye-doped ones, for planar waveguides. Using this cost-effective and easy-to-scale-up technique it was possible to obtain polystyrene (PS), poly(benzyl methacrylate) (PBzMA), polycarbonate (PC), and polysulfone (PSU) homogenous undoped films on soda-lime glass substrates. The thickness of the obtained layers was in the sub-micrometric range, and their RI was in the range of 1.56–1.62, which was determined using profilometry and spectroscopic ellipsometry. Numerical calculations confirmed that the films fabricated on soda-lime glass substrates meet the criteria to work as planar waveguides. Moreover, the structurization of the polymer films using the thermal nanoimprint lithography (TNIL) technique in the temperature range of 80–200 °C was presented, revealing the highest processing temperature for the PSU films and the lowest one for the PBzMA films.</div><div>High RI PSU films doped with eleven different luminescent organic dyes, exhibiting emissions spanning the entire visible spectral range, were successfully fabricated. Spectroscopic techniques such as absorption, excitation, and emission measurements were used to characterize their luminescent properties. Moreover, a dye exhibiting solvatochromism (Nile Red – NR), and a dye showing a tendency for aggregation (Rhodamine 6G – Rh6G) were investigated in all the studied polymer matrices. Among all the examined polymers, PSU was the most polar and caused the lowest luminescence quenching of the Rh6G dye, having simultaneously the highest RI (1.62). We anticipate that the fabricated films could be used in planar photonic systems as waveguiding films, in light amplification systems, or as solar cell concentrators.</div></div>","PeriodicalId":302,"journal":{"name":"Dyes and Pigments","volume":"235 ","pages":"Article 112591"},"PeriodicalIF":4.1,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fluorescent nanosensors for the detection of hydrogen peroxide: Materials, design strategies and applications

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-12-06 DOI: 10.1016/j.dyepig.2024.112592

Yunxue Sun , Lijie Xu , Xuetao Zhang , Jing Zhang , Meng Gao , Guanchen Xu

Hydrogen peroxide (H₂O₂) is an important molecule in both industrial and biological processes. However, H₂O₂ is hazardous to human health and life when its concentration exceeds a certain value. Therefore, developing effective strategies for accurately detecting H₂O₂, especially at very low (sub μM) concentrations, is highly required in chemical sensing and biomedical diagnosis. The integration of fluorescent nanomaterials with analytical tools has attracted great attention in the field of analysis science and provided novel materials for H₂O₂ analysis due to the extraordinary properties of nanomaterials. Till date, various fluorescent nanomaterials are designed to selectively and quantitatively detect H₂O₂. This review centers on the mechanisms underlying H₂O₂ sensing and the applications of various nanosensors based on fluorescent nanomaterials for H₂O₂ detection. Finally, elucidate pertinent perspectives concerning fluorescent nanomaterials-based H₂O₂ sensors are presented.

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引用次数: 0

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