scholarly journals Vinylene-Bridged Cyclic Dipyrrin and BODIPY Trimers

2020 ◽  
Vol 21 (21) ◽  
pp. 8041
Author(s):  
Songlin Xue ◽  
Daiki Kuzuhara ◽  
Naoki Aratani ◽  
Hiroko Yamada
Keyword(s):  
Charge Transfer ◽  
Theoretical Calculation ◽  
Intramolecular Charge Transfer ◽  
The Novel ◽  
No Emission ◽  
Reaction Conditions ◽  
Planar Structures ◽  
Boron Complexes ◽  
Boron Difluoride ◽  
Boron Ions

Vinylene-bridged cyclic boron–difluoride complex of dipyrrin (BODIPY) trimers were successfully prepared from expanded dimethyl-vinylene bridged hexaphyrin(2.1.2.1.2.1) Me-Hex that has the structure of alternate dipyrrins and vinylene bridges. The hexaphyrin(2.1.2.1.2.1) Me-Hex can coordinate with boron ions to afford five kinds of cyclic BODIPYs given by step-by-step boron complexations. Crystal structures of all cyclic BODIPYs except for 3BF2-Me-Hex(b) formed non-planar structures. The theoretical calculation predicted that mono-/bis-boron cyclic BODIPYs show the intramolecular charge transfer (ICT) characteristics, whereas tri-boron cyclic BODIPYs have no ICT characteristics. Reflecting these electronic properties, tri-boron cyclic BODIPYs exhibit weak fluorescence in the red region, but mono-/bis-boron cyclic BODIPYs exhibit no emission. Vinylene bridged cyclic dipyrrin trimer Me-Hex is the novel porphyrinoid ligand allowed to control the boron coordination under different reaction conditions to form various boron complexes.

Dynamic adjustment of emission from both singlets and triplets: the role of excited state conformation relaxation and charge transfer in phenothiazine derivates

2021 ◽  
Author(s):  
Weidong Qiu ◽  
Xinyi Cai ◽  
Mengke Li ◽  
Liangying Wang ◽  
Yanmei He ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Intramolecular Charge Transfer ◽  
Dynamic Adjustment ◽  
Twisted Intramolecular Charge Transfer

Dynamic adjustment of emission behaviours by controlling the extent of twisted intramolecular charge transfer character in excited state.

Charge transfer energies of the complexes of (dibenzoylmethanato)boron difluoride with indeno-pyridines and polynuclear aromatic hydrocarbons

2013 ◽  
Vol 108 ◽  
pp. 181-185 ◽  
Author(s):  
Tandrima Chaudhuri ◽  
Sneha Salampuria ◽  
Pradip Kumar Tapaswi ◽  
Chhanda Mukhopadhyay ◽  
Subrata Chattopadhyay ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Aromatic Hydrocarbons ◽  
Polynuclear Aromatic Hydrocarbons ◽  
Boron Difluoride

Steric Effects on Intramolecular Charge Transfer Fluorescence of Benzo[b]thiophene-1,1-dioxide Bridged Macrocages

2021 ◽  
Author(s):  
Keita Nobuhara ◽  
Yusuke Inagaki ◽  
Wataru Setaka
Keyword(s):  
Charge Transfer ◽  
Intramolecular Charge Transfer ◽  
Fluorescence Properties ◽  
Steric Effects ◽  
Sensor Molecules

Intramolecular charge transfer (ICT) fluorescence has been widely investigated and exploited in sensor molecules. However, steric effects on the ICT fluorescence properties have rarely been reported so far, although research...

scholarly journals Counterion Migration Driven by Light-Induced Intramolecular Charge Transfer

JACS Au ◽  
2021 ◽  
Author(s):  
Ta-Chun Lin ◽  
Zong-Ying Liu ◽  
Shih-Hung Liu ◽  
Igor O. Koshevoy ◽  
Pi-Tai Chou
Keyword(s):  
Charge Transfer ◽  
Intramolecular Charge Transfer

Photo-Induced Partially Aromatized Intramolecular Charge Transfer

2021 ◽  
Author(s):  
Angel H. Romero ◽  
Ivan E. Romero ◽  
Oscar E. Piro ◽  
Gustavo A. Echeverría ◽  
Lourdes A. Gotopo ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Intramolecular Charge Transfer
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