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Organic luminophores have been increasingly applied in various fields and the corresponding structural studies are emerging as hot topics, which supply essential information on the relationships between molecular structures and photophysical properties. Herein, a series of 9-styrylanthracene-based luminophores with different geometries (symmetrical DTVA, asymmetrical TVA and CPVA) were facilely synthesized for a systematical photophysical invesitigation. The targets display reversible and diverse mechanofluorochromism in the solid state. In particular, DTVA and TVA exhibit an obviously higher solid-state fluorescence quantum efficiency and distinctive AIE-active behavior, with contrary emission shifts under external force. Moreover, DTVA and TVA showed high sensitivity for detection of picric acid (PA) in aggregated states. This study may be helpful to reveal the structural essence of luminesecent materials and pave the way to the development of novel functional luminophores. [ABSTRACT FROM AUTHOR]

Two dumbbell-shaped organogelators with a p-quaterphenylene core were synthesized, and their self-assembly properties were investigated. These low-molecular-weight gelators could form self-supporting gels in many apolar organic solvents with an H-type aggregation form through a synergic effect of π-π stacking, intermolecular translation-related hydrogen bonding, and van der Waals forces. In comparison to the p-terphenylene-cored gelator, the extended π-conjugated segment improved the gelation efficiency significantly with enhanced gelation rate. Additionally, these p-quaterphenylene-centered gelators exhibited strong fluorescence emission induced by aggregation, which not only provided an in situ method to optically monitor the gelation process, but also endowed these self-assemblies with substantial applications in sensing explosives. [ABSTRACT FROM AUTHOR]

Supramolecular self ‐ assembly of emissive conjugated molecules has gained tremendous attention over the past few decades. In this study, two dumbbell ‐ shaped organogelators with a p ‐ quaterphenylene core were synthesized and their gelation behaviors investigated. The two gelators exhibited aggregation ‐ induced emission, which not only provided an in ‐ situ method to optically study the gelation process but also endowed these self ‐ assemblies with substantial applications in sensing explosives, such as picric acid. Quantitative studies showed that self ‐ assemblies of p ‐ quaterphenylene ‐ based molecules displayed a better sensing performance for picric acid than those of the p ‐ terphenylene counterpart and tetraphenylethene. More information can be found in the Full Paper by Yulan Chen et al. on page   52 in Issue 1, 2017 (DOI: 10.1002/asia.201601388). [ABSTRACT FROM AUTHOR]