Bending-Induced Fluorescence Shift of Dual-Shaped Flexible Organic Crystals from a Diaminoterephthalate with Nonplanar Conformation

Yuan Wang, Yingying Yang, Chuanxin Wei, Peng Yu, Xiaojie Cheng, Jiewei Li, Jianfeng Zhao, Jinyi Lin, Linghai Xie

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The development of flexible crystalline materials with a bending-induced fluorescence shift (BIFS) remains a challenge. The flexible crystals with BIFS properties reported so far are mainly realized by chemical structures with a planar conformation or a special donor-π-acceptor configuration. Here, BIFS is simultaneously achieved in the straight-shaped (Cry-S) and naturally curved (Cry-NC) crystal prepared by a halogenated diaminoterephthalate derivative with a nonplanar conformation. Cry-S displays an obviously reversible red-shifted fluorescence (∼20 nm) in the bent position compared with its original (undeformed) state. In contrast to the naturally curved position (undeformed), Cry-NC similarly shows a red shift (∼16 nm) at its acutely bent position (deformed). In addition, Cry-S and Cry-NC can be reversibly bent in a wide temperature range from - 6 to 180 °C under mechanical external force. It is hoped that this work would facilitate the design of BIFS materials and their applications in the field of mechanically stimulated light sensors.

Original languageEnglish
Pages (from-to)5651-5657
Number of pages7
JournalCrystal Growth and Design
Volume23
Issue number8
DOIs
StatePublished - 2 Aug 2023

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