Recyclable mechanoluminescent luminogen: different polymorphs, different self-assembly effects of the thiophene moiety and recovered molecular packing via simple thermal-treatment

Abstract

We report a purely organic recyclable mechanoluminescent luminogen (tPE-5-MeTh) with a thiophene group as the self-assembly unit. The recoverability could be achieved through simple thermal-treatment.

Mechanoluminescence or Room‐Temperature Phosphorescence: Molecular Packing‐Dependent Emission Response

“…Also, the fracture process of different crystals can be illustrated by PXRD (Supporting Information, Figure S20). Actually, the intrinsic mechanism of ML is extremely complicated, because there are too many unknown process under the mechanical force, and the light emission process is too short to be investigated in detail . For the ML effect of crystal B, solid‐state 13 C‐NMR was confirmed as the efficient method to explore the possible mechanism for the excitation process by mechanical force, which may be helpful to the analysis of the ML process of many other organic crystals.…”

The Aggregation Regularity Effect of Multiarylpyrroles on Their Near‐Infrared Aggregation‐Enhanced Emission Property

“…[37] Li et al explored the effects of molecular packing and different morphologies on emission behavior. [38][39][40][41] Ta ng andZ hao synthesized a series of pyridinium-functionalizedT PE salts that had different alkyl chains. The length of the chain had little influence on the opticalp ropertiesi ns olutiond ue to the similar electronic structure, but different hydrophobicities in aqueous media affected the aggregate morphology, leadingt od iversee mission behaviors.…”

“…Li et al. explored the effects of molecular packing and different morphologies on emission behavior [38–41] . Tang and Zhao synthesized a series of pyridinium‐functionalized TPE salts that had different alkyl chains.…”

Stimuli responsive aggregation-induced emission of bis(4-((9H-fluoren-9-ylidene)methyl)phenyl)thiophene single crystals

“…Moreover, such approach due to weak intra-and intermolecular interactions might lead to high sensitivity of the molecule to external stimuli, what could be exploited for optical recording or sensing applications. [11][12][13][14]28 The optoelectronic performance of organic highly-luminescent materials strongly depends not only on the chemical structure of the system, but also on crystal packing 17 and molecular conformation; 29 both were recently considered to be extremely important factors for material photophysics. 17,30,31 Therefore, the study of polymorphic stimuli-responsive AIE-active materials especially with well-defined molecular and crystal structures is indispensable for the understanding of fundamental structure-property relationships to design novel high-performance luminescent materials.…”