Thermochromic aggregation-induced dual phosphorescence via temperature-dependent sp3-linked donor-acceptor electronic coupling.
TLDR
The reported molecular construct serves as an intermediary case between a fully conjugated donor-acceptor system and a donor/acceptor binary mix, which may provide important clues on the design and control of high-freedom molecular systems with complex excited-state dynamics.Abstract:
Aggregation-induced emission (AIE) has proven to be a viable strategy to achieve highly efficient room temperature phosphorescence (RTP) in bulk by restricting molecular motions. Here, we show that by utilizing triphenylamine (TPA) as an electronic donor that connects to an acceptor via an sp3 linker, six TPA-based AIE-active RTP luminophores were obtained. Distinct dual phosphorescence bands emitting from largely localized donor and acceptor triplet emitting states could be recorded at lowered temperatures; at room temperature, only a merged RTP band is present. Theoretical investigations reveal that the two temperature-dependent phosphorescence bands both originate from local/global minima from the lowest triplet excited state (T1). The reported molecular construct serves as an intermediary case between a fully conjugated donor-acceptor system and a donor/acceptor binary mix, which may provide important clues on the design and control of high-freedom molecular systems with complex excited-state dynamics. Aggregation-induced emission (AIE) has proven to be a viable strategy to achieve highly efficient room temperature phosphorescence (RTP) in bulk by restricting molecular motions. Here, the authors present an RTP design strategy by combining the concept of AIE and donor-acceptor motif and demonstrate unusual thermochromic dual phosphorescence.read more
Citations
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Ab initio calculation of vibrational absorption and circular dichroism spectra using density functional force fields
TL;DR: In this paper, the unpolarized absorption and circular dichroism spectra of the fundamental vibrational transitions of the chiral molecule, 4-methyl-2-oxetanone, are calculated ab initio using DFT, MP2, and SCF methodologies and a 5S4P2D/3S2P (TZ2P) basis set.
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Guest-host doped strategy for constructing ultralong-lifetime near-infrared organic phosphorescence materials for bioimaging
Fuming Xiao,Heqi Gao,Yunxiang Lei,Wenbo Dai,Miaochang Liu,Xiaoyan Zheng,Zhengxu Cai,Xiaobo Huang,Huayue Wu,Dan Ding +9 more
TL;DR: In this article , the authors obtained organic room temperature phosphorescence materials with long wavelengths (600/657-681/732 nm) and long lifetimes (102-324 ms) for the first time through the guest-host doped strategy.
Journal ArticleDOI
Guest-host doped strategy for constructing ultralong-lifetime near-infrared organic phosphorescence materials for bioimaging
Fuming Xiao,Heqi Gao,Yunxiang Lei,Wenbo Dai,Miaochang Liu,Xiaoyan Zheng,Zhengxu Cai,Xiaobo Huang,Huayue Wu,Dan Ding +9 more
TL;DR: In this article , the authors obtained organic room temperature phosphorescence materials with long wavelengths (600/657-681/732 nm) and long lifetimes (102-324 ms) for the first time through the guest-host doped strategy.
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Activating Room-Temperature Phosphorescence of Organic Luminophores via External Heavy-Atom Effect and Rigidity of Ionic Polymer Matrix**
TL;DR: In this article, the authors put forward a new general strategy to design and develop pure organic room-temperature phosphorescence (RTP) materials starting from existing library of organic dyes without complicated chemical synthesis.
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On-demand modulating afterglow color of water-soluble polymers through phosphorescence FRET for multicolor security printing
Hao Peng,Gao Xie,Yang Cao,Long Zhang,Xi Yan,Xiao Zhang,Shihao Miao,Ye Tao,Huanhuan Li,Chao Zhang,Wei Huang,Runfeng Chen +11 more
TL;DR: In this article , the authors present an effective strategy for on-demand engineering of afterglow color in water-soluble polymeric systems via efficient phosphorescence Förster resonance energy transfer.
References
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