Dai Shuting, Li Xiao-Ze, Liu Jiawen, Zhang Chenchen, Hu Jiasong, Liu Zhaoyang, Fang Hong-Hua, Sun Hong-Bo, Xu Bin, Tian Wenjing
Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Qianjin Street No. 2699, Changchun, 130021, P. R. China.
State Key Laboratory of Precision Measurement Technology & Instruments, Department of Precision Instrument, Tsinghua University, Beijing, 100084, P. R. China.
Angew Chem Int Ed Engl. 2025 Jan 10;64(2):e202414960. doi: 10.1002/anie.202414960. Epub 2024 Oct 30.
Organic fluorophores with tunable π-conjugated paths have attracted considerable attention owing to their diverse properties and promising applications. Herein, we present a tailored butterfly-like molecule, 2,2'-(2,5-bis (2,2-diphenylvinyl)-1,4-phenylene)dinaphthalene (BDVPN), which exhibits diverse photophysical features in its two polymorphs. The BP phase crystal, with its "aligned wings" conformation, possesses emissive characteristics that are nearly identical to those in dilute solutions. In contrast, the BN phase crystal, which adopts an "orthogonal wings" conformation, exhibits an unusual hypsochromic-shifted emission compared to its dilute solution counterparts. This intriguing hypsochromic-shifted emission originates from the reduction in the effective conjugated length of the molecular skeleton. Notably, BN phase crystals also exhibit exceptional optical performance, featuring high-efficiency emission (76.6 %), low-loss optical waveguides (0.571 dB mm), deep-blue amplified spontaneous emission (ASE) with narrow full width at half maximum (FWHM: 6.4 nm), and a unique 200 nm bathochromic shift of piezochromic luminescence.
具有可调节π共轭路径的有机荧光团因其多样的性质和广阔的应用前景而备受关注。在此，我们展示了一种定制的蝴蝶状分子，2,2'-(2,5-双(2,2-二苯基乙烯基)-1,4-亚苯基)二萘(BDVPN)，它在两种多晶型物中表现出多样的光物理特性。BP相晶体具有“对齐翅膀”的构象，其发射特性与稀溶液中的几乎相同。相比之下，采用“正交翅膀”构象的BN相晶体与其稀溶液对应物相比，表现出不寻常的蓝移发射。这种有趣的蓝移发射源于分子骨架有效共轭长度的缩短。值得注意的是，BN相晶体还表现出优异的光学性能，具有高效发射(76.6%)、低损耗光波导(0.571 dB mm)、半高宽窄(6.4 nm)的深蓝色放大自发发射(ASE)以及独特的200 nm压致变色发光红移。
