Triphenylamine-Corrole Donor-Acceptor Systems: Synthesis, Spectroscopy, and Photophysical Studies^!

IF 3.3 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Chemistry - An Asian Journal Pub Date : 2025-09-16 DOI:10.1002/asia.70310

Renikindi Sravani, Swathi Nenavath, Sai Prasanna Palacharla, Lingamallu Giribabu

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引用次数: 0

Abstract

Donor-Acceptor (D-A) systems in which a triphenylamine has tethered at meso phenyl position of corrole (1-TPA-Cor) corrole monomer, (2-TPA-Cor) corrole dimer, and (3-TPA-Cor) corrole trimer have been designed and synthesized. All three D-A systems have been characterized by various spectroscopic techniques that include ¹H NMR, ¹³C NMR, HR -MS, absorption, and emission (both steady-state and lifetime) spectroscopies as well as electrochemical methods. Optical and theoretical studies suggest that there will be π-π interactions between donor triphenylamine (TPA) and acceptor corrole (Cor) units and as a result both Soret and Q-bands are red-shifted with broadening of Soret band. Selective excitation of TPA in these D-A systems at 300 nm resulted in the quenching of TPA emission suggested the photo-induced electron transfer (PET) from ¹TPA^* to corrole. In contrast, excited at 405 nm also resulted in quenching of emission of Cor. As the number of corrole units and polarity of the solvent increased the quenching is more and suggested that PET reactions in these D-A systems. Time-resolved fluorescence studies shown the presence of PET within these systems and revealed an ultra-fast electron rate of ∼10⁸ to 10¹⁰ s^-1, follows the order 3-TPA-Cor > 2-TPA-Cor > 1-TPA-Cor and are polarity of solvent dependent.

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三苯胺- corrole供体-受体系统：合成、光谱学和光物理研究！

设计并合成了三苯胺拴在邻苯二聚体（1-TPA-Cor）、邻苯二聚体（2-TPA-Cor）和邻苯三聚体（3-TPA-Cor）介苯基位置的供体-受体（D-A）体系。所有三种D-A体系都通过各种光谱技术进行了表征，包括1H NMR， 13C NMR, HR -MS，吸收和发射（稳态和寿命）光谱以及电化学方法。光学和理论研究表明，供体三苯胺（TPA）和受体corrole （Cor）之间存在π-π相互作用，导致Soret和q波段都随着Soret波段的变宽而红移。在这些D-A体系中，在300 nm处选择性激发TPA导致TPA发射猝灭，这表明了从1TPA*到corrole的光致电子转移（PET）。相反，在405 nm处激发也导致了Cor的发射猝灭，随着corrole单位数量和溶剂极性的增加，猝灭的次数更多，这表明PET反应在这些D-A体系中发生。时间分辨荧光研究表明这些体系中存在PET，并显示出超快的电子速率为~ 108至1010 s-1，遵循3-TPA-Cor > - 2-TPA-Cor > - 1-TPA-Cor的顺序，并且与溶剂的极性有关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemistry - An Asian Journal 化学-化学综合

CiteScore

7.00

自引率

2.40%

发文量

535

审稿时长

1.3 months

期刊介绍： Chemistry—An Asian Journal is an international high-impact journal for chemistry in its broadest sense. The journal covers all aspects of chemistry from biochemistry through organic and inorganic chemistry to physical chemistry, including interdisciplinary topics. Chemistry—An Asian Journal publishes Full Papers, Communications, and Focus Reviews. A professional editorial team headed by Dr. Theresa Kueckmann and an Editorial Board (headed by Professor Susumu Kitagawa) ensure the highest quality of the peer-review process, the contents and the production of the journal. Chemistry—An Asian Journal is published on behalf of the Asian Chemical Editorial Society (ACES), an association of numerous Asian chemical societies, and supported by the Gesellschaft Deutscher Chemiker (GDCh, German Chemical Society), ChemPubSoc Europe, and the Federation of Asian Chemical Societies (FACS).