Supramolecular host-guest and fluorescence studies on Ni-Salphen complex as a binding unit on edge oxidised graphene oxide grafted nanomaterial

IF 2.1 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY Supramolecular Chemistry Pub Date : 2021-11-02 DOI:10.1080/10610278.2022.2159824

Paulina Hernández‐Pacheco, Gustavo A. Zelada‐Guillén, M. Flores‐Álamo, Martha V. Escárcega‐Bobadilla

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Abstract

ABSTRACT The synthesis, characterisation, and crystallographic analysis of a novel -OH functionalised Ni-Salphen complex and its hybrid nanomaterial counterparts in the form of the molecule covalently bonded to Edge-Oxidised Graphene Oxide are described. Spectrophotometric titrations of the complex and of the nanomaterial performed against different pyridine-based guests showed a constant stoichiometry of association but different trends in association constants upon grafting. These changes could be ascribed to differences in the supramolecular environment at the binding site upon grafting, which may find cooperativity thanks to additional interactions arising from the graphene component. The spectrofluorimetric emission profile was explored before and upon association to find that emission intensity was affected in a different manner depending on whether the complex was used as a free molecule or in the hybrid nanomaterial, while it also depended on the size and flexibility of the guest used. Graphical Abstract

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边缘氧化石墨烯接枝纳米材料上Ni-Salphen配合物结合单元的超分子主客体和荧光研究

摘要:本文描述了一种新型-OH官能化Ni-Salphen配合物的合成、表征和晶体学分析，以及与边缘氧化石墨烯共价结合的分子形式的杂化纳米材料。对配合物和纳米材料对不同吡啶基客体进行的分光光度滴定表明，结合的化学计量常数不变，但接枝后的结合常数变化趋势不同。这些变化可以归因于接枝时结合位点的超分子环境的差异，这可能是由于石墨烯组分产生的额外相互作用而产生的协同性。在关联之前和之后对荧光光谱发射谱进行了探索，发现发射强度以不同的方式受到影响，这取决于该配合物是作为自由分子使用还是在混合纳米材料中使用，同时也取决于所使用客体的大小和灵活性。图形抽象

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来源期刊

Supramolecular Chemistry 化学-化学综合

CiteScore

3.60

自引率

3.00%

发文量

审稿时长

2.7 months

期刊介绍： Supramolecular Chemistry welcomes manuscripts from the fields and sub-disciplines related to supramolecular chemistry and non-covalent interactions. From host-guest chemistry, self-assembly and systems chemistry, through materials chemistry and biochemical systems, we interpret supramolecular chemistry in the broadest possible sense. Interdisciplinary manuscripts are particularly encouraged. Manuscript types include: high priority communications; full papers; reviews, and; Methods papers, techniques tutorials highlighting procedures and technologies that are important to the field. We aim to publish papers in a timely fashion and as soon as a paper has been accepted and typeset it will be published in electronic form on the Latest articles section of the website. The two most important review criteria are that the paper presents high-quality work that fits generally into the broad spectrum of activities in the supramolecular chemistry field. Under normal circumstances, Supramolecular Chemistry does not consider manuscripts that would be more suitable in a highly specialized journal. This includes, but is not limited to, those based mostly or exclusively on topics such as solid state/X-ray structures, computational chemistry, or electrochemistry. . The two most important review criteria are that the paper presents high-quality work that fits generally into the broad spectrum of activities in the supramolecular chemistry field.