1393358-33-2Relevant academic research and scientific papers
Dicyanoboron diketonate dyes: Synthesis, photophysical properties and bioimaging
Zhou, Yan,Chen, Yu-Zhe,Cao, Jian-Hua,Yang, Qing-Zheng,Wu, Li-Zhu,Tung, Chen-Ho,Wu, Da-Yong
, p. 162 - 169 (2014/08/18)
A new class of dicyanoboron diketonates (B(CN)2) was synthesized and the photophysical properties were investigated. The B(CN)2 complexes exhibited high molar absorption coefficients, large Stokes shifts, high photostability and low cytotoxicity. Especially, the emission of the B(CN)2 extended into the deep red region. The extensive π conjugation and the presence of intramolecular charge transfer (ICT) transitions are responsible for their red-shifted emission. Their fluorescence are very sensitive to the polarity of the solvents. They are highly emissive in low polarity solvents, but weakly fluorescent in polar solvents. Cell imaging experiments demonstrated its potential application as a probe in bioorganisms due to its excellent imaging contrast. This strategy represents a facile approach to modulate the photophysical properties of dyes.
A mechanistic investigation of mechanochromic luminescent organoboron materials
Sun, Xingxing,Zhang, Xuepeng,Li, Xinyang,Liu, Shiyong,Zhang, Guoqing
, p. 17332 - 17339 (2012/11/07)
Mechanochromic luminescence (ML) refers to the luminescence color and/or intensity change of solid-state materials induced by mechanical perturbations. For organic molecular solids, this phenomenon is related to the specific packing modes and orientations of individual fluorophores, which could give rise to different excited-state interactions. The molecular solids of difluoroboron dibenzoylmethane (BF2dbm) derivatives were previously found to exhibit reversible ML at room temperature and are promising as self-healing optical materials. In this report, we aim to shed some light on the mechanism of BF2dbm ML by trying to understand the excited-state interactions among solid-state BF2dbm molecules and elucidate how these interactions change upon mechanical stimulation. We first investigated the optical properties of monomeric, dimeric, and polymeric BF2dbm derivatives in optically dilute solutions and demonstrated unambiguously that BF2dbm moieties have a propensity to form H-aggregates. Next, we studied the physical properties of these boron complexes in the solid state including their crystal structures, fluorescence emissions, and mechanochromic luminescence. By correlating solution data with the solid-state characterization results, it was concluded that two coupled processes, force-induced emissive H-aggregate formation and energy transfer to the emissive H-aggregates, are responsible for the observed BF2dbm ML in the solid state. The Royal Society of Chemistry 2012.
