Excited-State Intramolecular Proton Transfer (ESIPT) Based Metal–Organic Supramolecular Optical Materials: Energy Transfer Mechanism and Luminescence Regulation Strategy,Accounts of Materials Research

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Excited-State Intramolecular Proton Transfer (ESIPT) Based Metal–Organic Supramolecular Optical Materials: Energy Transfer Mechanism and Luminescence Regulation Strategy
Accounts of Materials Research ( IF 14.0 ) Pub Date : 2023-10-03 , DOI: 10.1021/accountsmr.3c00139
Peng-Yan Fu ₁ , Shao-Zhe Yi ₁ , Mei Pan ₁ , Cheng-Yong Su ₁

Affiliation

During the past few years, excited-state intramolecular proton transfer (ESIPT) has attracted great attention in the field of metal–organic optical materials due to their rich photophysical properties. Generally, the ESIPT process includes unique four-leveled photocycle and concomitant multiemissions, leading to complex luminescence mechanisms and variable luminescence phenomena. In contrast with the widely reported research on pure organic photoluminescent molecules, with the aid of modern techniques such as in situ X-ray diffraction and transient photophysical study, metal–organic supramolecular optical materials are emerging in recent years, which have adjustable frame structures, diverse emission types, and excellent optical performance. Through regulating the equilibrium and transformation relationship of various photophysical processes in the ESIPT excited-state (nonradiative transitions, radiative transitions, energy transfer, charge transfer, etc.), ESIPT-based metal–organic supramolecular optical materials demonstrate rich luminescence mechanisms and wide applications in displaying, sensing, imaging, lasing, etc. Given that the deep understanding of the properties of ESIPT metal–organic supramolecular materials is still in its infancy, numerous new strategies for regulating luminescence mechanisms need to be established urgently. In this short Account, we describe a construction and luminescence regulation system for ESIPT metal–organic supramolecular materials, including four types of energy levels conversion, corresponding photoluminescence (PL) regulation strategies, and potential application demonstrations.

中文翻译：

激发态分子内质子转移（ESIPT）基金属有机超分子光学材料：能量转移机制和发光调控策略

近年来，激发态分子内质子转移（ESIPT）因其丰富的光物理性质而在金属有机光学材料领域引起了极大的关注。一般来说，ESIPT过程包括独特的四级光循环和伴随的多重发射，导致复杂的发光机制和可变的发光现象。与广泛报道的纯有机光致发光分子的研究不同，借助原位X射线衍射和瞬态光物理研究等现代技术，近年来出现了金属有机超分子光学材料，其具有可调节的框架结构，发射类型多样，光学性能优异。通过调节ESIPT激发态下各种光物理过程（非辐射跃迁、辐射跃迁、能量转移、电荷转移等）的平衡和转化关系，基于ESIPT的金属有机超分子光学材料表现出丰富的发光机制和广泛的应用鉴于对ESIPT金属有机超分子材料性质的深入了解仍处于起步阶段，迫切需要建立许多调控发光机制的新策略。在这篇简短的文章中，我们描述了ESIPT金属有机超分子材料的构建和发光调控系统，包括四种类型的能级转换、相应的光致发光（PL）调控策略和潜在的应用示范。

更新日期：2023-10-03

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