Temperature dependent spectroscopic and excited state dynamics of 3-hydroxychromones with electron donor and acceptor substituents

2017 ◽  
Vol 5 (2) ◽  
pp. 024011 ◽  
Author(s):  
Alan Szalai ◽  
Luciana Giordano ◽  
Verónica M Sánchez ◽  
Teresa D Z Atvars ◽  
Marcelo Faleiros ◽  
...  
Keyword(s):  
Excited State ◽  
Electron Donor ◽  
Temperature Dependent ◽  
Excited State Dynamics ◽  
Donor And Acceptor ◽  
Electron Donor And Acceptor

Influence of electron donor and acceptor substituents on the excited state properties of rhenium(I) tetracarbonyl chelate complexes

1998 ◽  
pp. 2893-2900 ◽  
Author(s):  
Frederik W. M. Vanhelmont ◽  
Melath V. Rajasekharan ◽  
Hans U. Güdel ◽  
Silvia C. Capelli ◽  
Jürg Hauser ◽  
...  
Keyword(s):  
Excited State ◽  
Electron Donor ◽  
Chelate Complexes ◽  
Donor And Acceptor ◽  
Electron Donor And Acceptor

scholarly journals Thermochromic aggregation-induced dual phosphorescence via temperature-dependent sp3-linked donor-acceptor electronic coupling

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Tao Wang ◽  
Zhubin Hu ◽  
Xiancheng Nie ◽  
Linkun Huang ◽  
Miao Hui ◽  
...  
Keyword(s):  
Excited State ◽  
Room Temperature ◽  
Electronic Coupling ◽  
Temperature Dependent ◽  
Molecular Systems ◽  
Donor And Acceptor ◽  
Theoretical Investigations ◽  
Donor Acceptor ◽  
And Control ◽  
Two Temperature

AbstractAggregation-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.

Dimethylalloxazine as an Electron Donor and Acceptor

Nature ◽  
1966 ◽  
Vol 211 (5045) ◽  
pp. 182-183 ◽  
Author(s):  
YOSHIO MATSUNAGA
Keyword(s):  
Electron Donor ◽  
Donor And Acceptor ◽  
Electron Donor And Acceptor
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