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锌阳离子对超分子组装动力学及卟啉J-聚集体手性的影响。

Effect of zinc cations on the kinetics of supramolecular assembly and the chirality of porphyrin J-aggregates.

作者信息

Romeo A, Castriciano M A, Zagami R, Pollicino G, Monsù Scolaro L, Pasternack R F

机构信息

Istituto per lo Studio dei Materiali Nanostrutturati ISMN-CNR c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali , University of Messina , V.le F. Stagno D'Alcontres, 31 , 98166 Messina , Italy . Email:

Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali , University of Messina , C.I.R.C.M.S.B , V.le F. Stagno D'Alcontres, 31 , 98166 Messina , Italy.

出版信息

Chem Sci. 2017 Feb 1;8(2):961-967. doi: 10.1039/c6sc02686a. Epub 2016 Sep 29.

DOI:10.1039/c6sc02686a
PMID:28451233
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5354048/
Abstract

Dilute aqueous solutions of anionic -4-sulfonatophenyl-porphyrin (TPPS) extract zinc(ii) ions from glass or quartz surfaces at room temperature and efficiently form the corresponding metal complex (ZnTPPS). The partial or complete formation of ZnTPPS has been probed by UV/Vis spectroscopy and both static and time-resolved fluorescence. The source of zinc(ii) ions has been clearly identified through inductively coupled plasma optical emission spectrometry. The presence of increasing amounts of ZnTPPS slows down the rate of TPPS J-aggregate formation in acid solution. This influences the nucleation step and has a profound impact on the onset of chirality in these species. This evidence indicates the important role of this adventitious metal ion in the interpretation of various spectroscopic and kinetic data for the self-assembly of the TPPS porphyrin and provides some insights into controversial findings on their chirality. The use of this metal derivative as the starting compound for formation of monomeric TPPS is suggested.

摘要

阴离子型4-磺酸基苯基卟啉（TPPS）的稀水溶液在室温下可从玻璃或石英表面萃取锌（II）离子，并有效地形成相应的金属配合物（ZnTPPS）。通过紫外/可见光谱以及静态和时间分辨荧光对ZnTPPS的部分或完全形成进行了探测。通过电感耦合等离子体发射光谱法明确确定了锌（II）离子的来源。在酸性溶液中，越来越多的ZnTPPS的存在减缓了TPPS J-聚集体的形成速率。这影响了成核步骤，并对这些物种手性的出现产生了深远影响。这一证据表明这种外来金属离子在解释TPPS卟啉自组装的各种光谱和动力学数据中起着重要作用，并为有关其手性的争议性发现提供了一些见解。建议使用这种金属衍生物作为形成单体TPPS的起始化合物。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5286/5354048/31e6b240b150/c6sc02686a-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5286/5354048/70d4437039cf/c6sc02686a-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5286/5354048/b22f78246858/c6sc02686a-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5286/5354048/88b2fa6a77ed/c6sc02686a-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5286/5354048/e563ad8526cf/c6sc02686a-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5286/5354048/31e6b240b150/c6sc02686a-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5286/5354048/70d4437039cf/c6sc02686a-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5286/5354048/b22f78246858/c6sc02686a-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5286/5354048/88b2fa6a77ed/c6sc02686a-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5286/5354048/e563ad8526cf/c6sc02686a-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5286/5354048/31e6b240b150/c6sc02686a-f5.jpg

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