Ali Wang, Yoshiaki Shuku, R. Suizu, Neil Robertson, K. Awaga
We synthesized a novel triptycene analogue, 3,3',3'',3''',3'''',3'''''-((triptycene-2,3,6,7,14,15-hexayl)hexakis(sulfanediyl))hexapropanenitrile (3), which served as a valuable precursor for the triptycene-derived tris-bidentate bridging dithiolene ligand, triptycene-2,3,6,7,14,15-hexakis(thiolate) (4), following the removal of the cyanoethyl moiety protection group. We determined the molecular and crystal structures of compound 3 and confirmed its capacity to yield compound 4. By reacting 3 with [NiCl2(BPY)] and [PtCl2(BPY)] (BPY: 2,2'-bipyridine) in methanol, we obtained crude samples of [Ni3(4)(BPY)3] and [Pt3(4)(BPY)3], respectively.
{"title":"Synthesis of a Novel Triptycene-derived Protected Dithiolene Ligand Precursor for Tri-nuclear Mixed Ligand Metal Dithiolene Complexes","authors":"Ali Wang, Yoshiaki Shuku, R. Suizu, Neil Robertson, K. Awaga","doi":"10.1093/chemle/upad051","DOIUrl":"https://doi.org/10.1093/chemle/upad051","url":null,"abstract":"\u0000 We synthesized a novel triptycene analogue, 3,3',3'',3''',3'''',3'''''-((triptycene-2,3,6,7,14,15-hexayl)hexakis(sulfanediyl))hexapropanenitrile (3), which served as a valuable precursor for the triptycene-derived tris-bidentate bridging dithiolene ligand, triptycene-2,3,6,7,14,15-hexakis(thiolate) (4), following the removal of the cyanoethyl moiety protection group. We determined the molecular and crystal structures of compound 3 and confirmed its capacity to yield compound 4. By reacting 3 with [NiCl2(BPY)] and [PtCl2(BPY)] (BPY: 2,2'-bipyridine) in methanol, we obtained crude samples of [Ni3(4)(BPY)3] and [Pt3(4)(BPY)3], respectively.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":"3 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139441425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Takayo Moriuchi-Kawakami, A. Higashikado, Masanari Hirahara, K. Fujimori, Toshiyuki Moriuchi
Highly selective poly(vinyl chloride) (PVC) membrane electrodes based on oxovanadium(IV) complexes of heteromacrocycle compounds as new ionophores for iodide-selective electrodes (ISEs) were fabricated with a composition of PVC (28.1 wt%), plasticizers (69.3 wt%), ionophores (2.6 wt%) and cation excluders (15 mol% relative to the ionophore). The prepared electrode on oxovanadium(IV) tetraphenyl porphyrin with o-NPOE as the membrane solvent and TDDACl as the cation excluder was found to exhibit the best sensitivity over a wide concentration range of 5.0×10–7 to 2.1×10–2 M with a Nernstian response of –59.02 mV per decade and the highest ion-selectivity toward the I– ions over perchlorate ions (I–/ClO4– = 91).
{"title":"Ionophoric Properties of Oxovanadium(IV) heteromacrocyclic complexes about the Anion-selectivity","authors":"Takayo Moriuchi-Kawakami, A. Higashikado, Masanari Hirahara, K. Fujimori, Toshiyuki Moriuchi","doi":"10.1093/chemle/upad058","DOIUrl":"https://doi.org/10.1093/chemle/upad058","url":null,"abstract":"\u0000 Highly selective poly(vinyl chloride) (PVC) membrane electrodes based on oxovanadium(IV) complexes of heteromacrocycle compounds as new ionophores for iodide-selective electrodes (ISEs) were fabricated with a composition of PVC (28.1 wt%), plasticizers (69.3 wt%), ionophores (2.6 wt%) and cation excluders (15 mol% relative to the ionophore). The prepared electrode on oxovanadium(IV) tetraphenyl porphyrin with o-NPOE as the membrane solvent and TDDACl as the cation excluder was found to exhibit the best sensitivity over a wide concentration range of 5.0×10–7 to 2.1×10–2 M with a Nernstian response of –59.02 mV per decade and the highest ion-selectivity toward the I– ions over perchlorate ions (I–/ClO4– = 91).","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":"35 6","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139389147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A novel organophotocatalytic process using riboflavin derivatives, which allows for aerobic oxidative multistep S–S, S–N, and S–O bond formations of thiols and amines, is presented herein. The reaction proceeded under mild metal-free conditions using air (1 atm) as an environment-friendly oxidant, yielding sulfinamides and sulfonamides.
{"title":"Riboflavin-Based Photocatalysis for Aerobic Oxidative S–N Bond Formation of Thiols and Amines","authors":"Marina Oka, Aki Takeda, Hiroki Iida","doi":"10.1093/chemle/upad057","DOIUrl":"https://doi.org/10.1093/chemle/upad057","url":null,"abstract":"\u0000 A novel organophotocatalytic process using riboflavin derivatives, which allows for aerobic oxidative multistep S–S, S–N, and S–O bond formations of thiols and amines, is presented herein. The reaction proceeded under mild metal-free conditions using air (1 atm) as an environment-friendly oxidant, yielding sulfinamides and sulfonamides.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":"110 8","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139388034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-01Epub Date: 2022-05-27DOI: 10.1177/11297298221099469
Rafael Noronha Cavalcante, Kenji Nishinari, Guiherme Centofanti, Mariana Krutman, Bruna De Fina, Victor Hamamoto Sato, Erico Souza de Oliveira, Leonardo Victor Barbosa Pereira, Sara Mohrbacher, Alessandra Martins Bales, Bernadete Maria Coelho Ferreira, Precil Diego Miranda de Menezes Neves, Pedro Renato Chocair, Américo Lourenço Cuvello Neto
Purpose: The purpose of this study is to evaluate the safety and efficacy of the mechanical thrombectomy with the Indigo System in the treatment of thrombosed arteriovenous fistulas and grafts.
Methods: A retrospective search of endovascular procedures performed from November 2018 to June 2020 was conducted. Inclusion criteria were: acute arteriovenous fistula or graft thrombosis that underwent endovascular mechanical thrombectomy with Indigo System. The following information was collected from each case: sex, age, fistula modality, fistula location, treatment modality, and outcomes. Endpoints evaluated were: technical and clinical success rates; primary, assisted primary, and secondary patency rates; complication rates.
Results: Twenty-six mechanical thrombectomy procedures for declotting of arteriovenous fistula thrombosis, using the Indigo System, were performed in 22 patients. Technical and clinical success was achieved in 23/26 cases (88%). Mean follow-up was 9 months (range 11-539 days). The 6-month primary, primary assisted, and secondary patency rates were 71%, 86%, 93% and the 12-month primary, primary assisted, and secondary patency rates were 71%, 72%, 80%, respectively. No technical or device-related complications were observed during thrombectomy, however two venous ruptures occurred on the angioplasty of the underlying stenosis.
Conclusion: In conclusion, vacuum-assisted thrombectomy of acutely thrombosed arteriovenous fistulas and grafts with Indigo System is safe and effective, providing good short term patency rates.
{"title":"The role of vacuum-assisted mechanical thrombectomy in the management of acutely thrombosed arteriovenous fistulas and grafts.","authors":"Rafael Noronha Cavalcante, Kenji Nishinari, Guiherme Centofanti, Mariana Krutman, Bruna De Fina, Victor Hamamoto Sato, Erico Souza de Oliveira, Leonardo Victor Barbosa Pereira, Sara Mohrbacher, Alessandra Martins Bales, Bernadete Maria Coelho Ferreira, Precil Diego Miranda de Menezes Neves, Pedro Renato Chocair, Américo Lourenço Cuvello Neto","doi":"10.1177/11297298221099469","DOIUrl":"10.1177/11297298221099469","url":null,"abstract":"<p><strong>Purpose: </strong>The purpose of this study is to evaluate the safety and efficacy of the mechanical thrombectomy with the Indigo System in the treatment of thrombosed arteriovenous fistulas and grafts.</p><p><strong>Methods: </strong>A retrospective search of endovascular procedures performed from November 2018 to June 2020 was conducted. Inclusion criteria were: acute arteriovenous fistula or graft thrombosis that underwent endovascular mechanical thrombectomy with Indigo System. The following information was collected from each case: sex, age, fistula modality, fistula location, treatment modality, and outcomes. Endpoints evaluated were: technical and clinical success rates; primary, assisted primary, and secondary patency rates; complication rates.</p><p><strong>Results: </strong>Twenty-six mechanical thrombectomy procedures for declotting of arteriovenous fistula thrombosis, using the Indigo System, were performed in 22 patients. Technical and clinical success was achieved in 23/26 cases (88%). Mean follow-up was 9 months (range 11-539 days). The 6-month primary, primary assisted, and secondary patency rates were 71%, 86%, 93% and the 12-month primary, primary assisted, and secondary patency rates were 71%, 72%, 80%, respectively. No technical or device-related complications were observed during thrombectomy, however two venous ruptures occurred on the angioplasty of the underlying stenosis.</p><p><strong>Conclusion: </strong>In conclusion, vacuum-assisted thrombectomy of acutely thrombosed arteriovenous fistulas and grafts with Indigo System is safe and effective, providing good short term patency rates.</p>","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":"1 1","pages":"113-118"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88984744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Keita Tani, Kako Ueno, Miyuki E. Masaki, Masatsugu Taneda, Kazushige Hori, Koji Kubono, Kenta Goto, Fumito Tani, Yukiyasu Kashiwagi, Takunori Harada
Chemistry Letters, Volume 52, Issue 11, Page 858-860, November 2023.
化学通讯》，第 52 卷，第 11 期，第 858-860 页，2023 年 11 月。
{"title":"Synthesis of Optically Active [3.3](3,9)Carbazolophane Derivatives and Their Chiroptical Properties","authors":"Keita Tani, Kako Ueno, Miyuki E. Masaki, Masatsugu Taneda, Kazushige Hori, Koji Kubono, Kenta Goto, Fumito Tani, Yukiyasu Kashiwagi, Takunori Harada","doi":"10.1246/cl.230349","DOIUrl":"https://doi.org/10.1246/cl.230349","url":null,"abstract":"Chemistry Letters, Volume 52, Issue 11, Page 858-860, November 2023. <br/>","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":"101 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138547543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A simple and quick analytical method for mercury in environmental water was developed by combining the enclosed quartz cell cold vapor atomic absorption spectrometry (EQC-CV-AAS) and alkaline reduction pretreatment. The advantages of this method include reduction in the mercury measurement time from 3 h to 5 min and possibility of the on-site mercury monitoring for environmental water matrix such as river and sea water. A quick analytical method for mercury was developed by combining the enclosed quartz cell cold vapor atomic absorption spectrometry and alkaline reduction pretreatment. The advantages of this method reduction in the measurement time from 3 h to 5 min and lower LOQ value than that proposed by the Water Pollution Prevention Act by the Ministry of the Environment, Japan.
{"title":"Simple and Quick Analysis for Mercury in Environmental Water using Alkaline Reduction Method along with Enclosed Quartz Cell-Cold Vapor Atomic Absorption Spectrometry","authors":"Haruki Tsuboi, Yuki Uga, Rushia Okunishi, Tomoaki Watanabe, Koutarou Sakamoto, Daisuke Kozaki","doi":"10.1246/cl.230290","DOIUrl":"https://doi.org/10.1246/cl.230290","url":null,"abstract":"A simple and quick analytical method for mercury in environmental water was developed by combining the enclosed quartz cell cold vapor atomic absorption spectrometry (EQC-CV-AAS) and alkaline reduction pretreatment. The advantages of this method include reduction in the mercury measurement time from 3 h to 5 min and possibility of the on-site mercury monitoring for environmental water matrix such as river and sea water. A quick analytical method for mercury was developed by combining the enclosed quartz cell cold vapor atomic absorption spectrometry and alkaline reduction pretreatment. The advantages of this method reduction in the measurement time from 3 h to 5 min and lower LOQ value than that proposed by the Water Pollution Prevention Act by the Ministry of the Environment, Japan.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135723960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ethel Jarine P. Cerezo, Lorico DS. Lapitan, Jonyl L. Garcia
This paper reports the first successful preparation of pyocyanin (PYO)-imprinted polydopamine-modified glassy carbon electrodes (PDA-GCE) using potentiodynamic electropolymerization. The molecularly imprinted PDA films showed an enhanced current response to pyocyanin than non-imprinted polydopamine (NIP) on GCE. The MIP-GCE sensor exhibited improved sensitivity, offering a linear range of 10 µM to 100 µM (r2 = 0.993), with a low limit of detection (6.45 µM) and limit of quantitation (21.5 µM). The MIP-PDA/GCE is a sensitive, selective electrochemical sensor for PYO. A pyocyanin (PYO)-imprinted polydopamine (MIP-PDA) was prepared for the first time. The MIP-PDA on glassy carbon is more sensitive to PYO than non-imprinted PDA. The MIP-PDA on glassy carbon is a sensitive, selective electrochemical sensor for PYO.
{"title":"Pyocyanin biomarker imprinted polydopamine for rapid and simple indirect detection of <i>Pseudomonas aeruginosa</i>","authors":"Ethel Jarine P. Cerezo, Lorico DS. Lapitan, Jonyl L. Garcia","doi":"10.1246/cl.230313","DOIUrl":"https://doi.org/10.1246/cl.230313","url":null,"abstract":"This paper reports the first successful preparation of pyocyanin (PYO)-imprinted polydopamine-modified glassy carbon electrodes (PDA-GCE) using potentiodynamic electropolymerization. The molecularly imprinted PDA films showed an enhanced current response to pyocyanin than non-imprinted polydopamine (NIP) on GCE. The MIP-GCE sensor exhibited improved sensitivity, offering a linear range of 10 µM to 100 µM (r2 = 0.993), with a low limit of detection (6.45 µM) and limit of quantitation (21.5 µM). The MIP-PDA/GCE is a sensitive, selective electrochemical sensor for PYO. A pyocyanin (PYO)-imprinted polydopamine (MIP-PDA) was prepared for the first time. The MIP-PDA on glassy carbon is more sensitive to PYO than non-imprinted PDA. The MIP-PDA on glassy carbon is a sensitive, selective electrochemical sensor for PYO.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":"28 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135723962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ultrafast cooling inhibits the growth of ice crystals and prevents red blood cells from being damaged by ice crystals. Micro-Powder-Dry(μPD), a novel freeze-drying technique, was applied in this work. Using the µPD approach, we looked at the hemolysis and morphology of frozen/freeze-dried red blood cells. After freezing, the µPD method had a higher recovery rate than the slow freezing method. The recovery of the red blood cells was maintained after freeze-drying. This study aims to develop freeze-dried red blood cells using a novel spray freeze-drying mathod called µPD(micro-powder-dry). In the µPD process, the solution is injected into a vacuum. Then the droplets self-freeze due to the decrease in temperature, forming ice particles. Lastly, they are heated and dried under a vacuum. The µPD powder is porous and exhibits excellent solubility.
{"title":"Freeze-drying of red blood cells using ultrafast cooling by spraying into a vacuum","authors":"Tomoka Konoo, Sora Uematsu, Tsutomu Nishihashi, Hirohiko Murakami, Hidemine Honda, Tsuyoshi Takiuchi, Tadashi Kimura","doi":"10.1246/cl.230348","DOIUrl":"https://doi.org/10.1246/cl.230348","url":null,"abstract":"Ultrafast cooling inhibits the growth of ice crystals and prevents red blood cells from being damaged by ice crystals. Micro-Powder-Dry(μPD), a novel freeze-drying technique, was applied in this work. Using the µPD approach, we looked at the hemolysis and morphology of frozen/freeze-dried red blood cells. After freezing, the µPD method had a higher recovery rate than the slow freezing method. The recovery of the red blood cells was maintained after freeze-drying. This study aims to develop freeze-dried red blood cells using a novel spray freeze-drying mathod called µPD(micro-powder-dry). In the µPD process, the solution is injected into a vacuum. Then the droplets self-freeze due to the decrease in temperature, forming ice particles. Lastly, they are heated and dried under a vacuum. The µPD powder is porous and exhibits excellent solubility.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135766102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Reaction of p-t-butylcalix[4]arene (BCA[4]) with α,ω-dibromoacetate (DBH) afforded a soluble cage compound, BCA[4]-DBH, in high yield. Single-crystal X-ray analysis revealed that BCA[4]-DBH contains a fixed cavity. Examination of host-guest chemistry showed that BCA[4]-DBH forms a 1 : 1 inclusion complex with phenol, with an association constant (K) of 34. Reaction of p-t-butylcalix[4]arene (BCA[4]) with α,ω-dibromoacetate (DBH) afforded a soluble cage compound, BCA[4]-DBH, in high yield. Single-crystal X-ray analysis revealed that BCA[4]-DBH contains a fixed cavity. Examination of host-guest chemistry showed that BCA[4]-DBH forms a 1 : 1 inclusion complex with phenol, with an association constant (K) of 34.
{"title":"Calixarene-based Cage Compound: Synthesis via Simple Condensation of <i>t</i>-Butylcalix[4]arene with α,ω-Dibromoacetate and Inclusion Complex Formation with Phenol","authors":"Hiroyuki Maekawa, Tatsuo Yajima, Hiroto Kudo","doi":"10.1246/cl.230377","DOIUrl":"https://doi.org/10.1246/cl.230377","url":null,"abstract":"Reaction of p-t-butylcalix[4]arene (BCA[4]) with α,ω-dibromoacetate (DBH) afforded a soluble cage compound, BCA[4]-DBH, in high yield. Single-crystal X-ray analysis revealed that BCA[4]-DBH contains a fixed cavity. Examination of host-guest chemistry showed that BCA[4]-DBH forms a 1 : 1 inclusion complex with phenol, with an association constant (K) of 34. Reaction of p-t-butylcalix[4]arene (BCA[4]) with α,ω-dibromoacetate (DBH) afforded a soluble cage compound, BCA[4]-DBH, in high yield. Single-crystal X-ray analysis revealed that BCA[4]-DBH contains a fixed cavity. Examination of host-guest chemistry showed that BCA[4]-DBH forms a 1 : 1 inclusion complex with phenol, with an association constant (K) of 34.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135805497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study, hydrophobic surfaces were prepared by depositing polystyrene (PS) on a glass substrate using three different methods to measure the interaction forces against a hydrophobized particle by atomic force microscopy. We found that smooth surfaces prepared by spin coating and living radical polymerization generated hydrophobic attraction, whereas uneven surfaces obtained by free radical polymerization produced only steric repulsion, even though they had sufficient hydrophobicity. Based on these results, the origin of the hydrophobic attraction was suggested. The interaction forces between hydrophobic surfaces prepared by depositing polystyrene on a glass substrate using three different methods and a hydrophobized particle were measured by atomic force microscopy. Surfaces prepared by spin coating and living radical polymerization generated hydrophobic attraction, whereas surfaces obtained by free radical polymerization produced no hydrophobic attraction, despite sufficient hydrophobicity. Based on these results, the origin of the hydrophobic attraction was suggested.
{"title":"Evaluation of hydrophobic attraction between polystyrene layer and silanated silica surface by atomic force microscopy","authors":"Yuta Okuda, Koreyoshi Imamura, Naoyuki Ishida","doi":"10.1246/cl.230363","DOIUrl":"https://doi.org/10.1246/cl.230363","url":null,"abstract":"In this study, hydrophobic surfaces were prepared by depositing polystyrene (PS) on a glass substrate using three different methods to measure the interaction forces against a hydrophobized particle by atomic force microscopy. We found that smooth surfaces prepared by spin coating and living radical polymerization generated hydrophobic attraction, whereas uneven surfaces obtained by free radical polymerization produced only steric repulsion, even though they had sufficient hydrophobicity. Based on these results, the origin of the hydrophobic attraction was suggested. The interaction forces between hydrophobic surfaces prepared by depositing polystyrene on a glass substrate using three different methods and a hydrophobized particle were measured by atomic force microscopy. Surfaces prepared by spin coating and living radical polymerization generated hydrophobic attraction, whereas surfaces obtained by free radical polymerization produced no hydrophobic attraction, despite sufficient hydrophobicity. Based on these results, the origin of the hydrophobic attraction was suggested.","PeriodicalId":9862,"journal":{"name":"Chemistry Letters","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135805496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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