Electron acceptors of the fluorene series. Part 5. Intramolecular charge transfer in nitro-substituted 9-(aminomethylene)fluorenes

1996 ◽  
pp. 2453 ◽  
Author(s):  
Igor F. Perepichka ◽  
Anatolii F. Popov ◽  
Tatyana V. Orekhova ◽  
Martin R. Bryce ◽  
Alexander N. Vdovichenko ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Intramolecular Charge Transfer ◽  
Electron Acceptors

Enhanced intramolecular charge transfer of unfused electron acceptors for efficient organic solar cells

2019 ◽  
Vol 3 (3) ◽  
pp. 513-519 ◽  
Author(s):  
Ran Qin ◽  
Weitao Yang ◽  
Shuixing Li ◽  
Tsz-Ki Lau ◽  
Zhipeng Yu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Organic Solar Cells ◽  
Intramolecular Charge Transfer ◽  
Electron Acceptors ◽  
Transfer Effects ◽  
Planar Configuration ◽  
Non Covalent Interactions ◽  
Covalent Interactions

The mediation of non-covalent interactions allowed unfused structures to exhibit a nearly planar configuration with strong charge-transfer effects, thereby ensuring efficient organic solar cells.

Heteroaryldisilenes: heteroaryl groups serve as electron acceptors for SiSi double bonds in intramolecular charge transfer transitions

2017 ◽  
Vol 46 (34) ◽  
pp. 11271-11281 ◽  
Author(s):  
Tomoyuki Kosai ◽  
Shintaro Ishida ◽  
Takeaki Iwamoto
Keyword(s):  
Charge Transfer ◽  
Intramolecular Charge Transfer ◽  
Electron Acceptors ◽  
Double Bonds ◽  
Charge Transfer Transitions

Heteroaryldisilenes and related disilenes were synthesized. In addition to anthracene and acridine units, thiophene and bithiophene units act as acceptors for the SiSi double bonds.

Optical Properties of Chromophores with Different Six-Membered N-Heterocyclic Aromatic Ring

2011 ◽  
Vol 236-238 ◽  
pp. 1598-1602
Author(s):  
Hai Tao Peng ◽  
Yue Zhi Cui ◽  
Tao Zhang ◽  
Yang Zhang ◽  
Hai Xing Guan
Keyword(s):  
Optical Properties ◽  
Dipole Moment ◽  
Charge Transfer ◽  
Quantum Yield ◽  
Aromatic Ring ◽  
Intramolecular Charge Transfer ◽  
Stokes Shift ◽  
Electron Acceptors ◽  
Methyl Groups ◽  
Molecular Dipole

A series of intramolecular charge transfer (ICT) molecules containing six-membered N-heterocyclic electron acceptors, as well as their phenyl analogue, have been synthesized. The pyrazine derivatives exhibit the largest quantum yield, stokes shift and the longest emission maxima wavelength due to the appropriate electronegativity of pyrazine, while the triazine derivative has much lower quantum yield due to its too strong ICT. The methyl groups at N-heterocyclic rings also have influence on the optical properties by disturbing the molecular dipole moment.

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.

Photoconductivity in Vacuum Deposited Films of Silicon-Based Polymers

1996 ◽  
Vol 444 ◽  
Author(s):  
H. Okumoto ◽  
M. Shimomura ◽  
N. Minami ◽  
Y. Tanabe
Keyword(s):  
Charge Transfer ◽  
Chemical Modification ◽  
Electronic Transport ◽  
Hole Transport ◽  
Electron Acceptors ◽  
Oxygen Atmosphere ◽  
Dangling Bonds ◽  
Silicon Based ◽  
Deposited Films

AbstractSilicon-based polymers with σconjugated electrons have specific properties; photoreactivity for microlithography and photoconductivity for hole transport materials. To explore the possibility of combining these two properties to develop photoresists with electronic transport capability, photoconductivity of polysilanes is investigated in connection with their photoinduced chemical modification. Increase in photocurrent is observed accompanying photoreaction of poly(dimethylsilane) vacuum deposited films. This increase is found to be greatly enhanced in oxygen atmosphere. Such changes of photocurrent can be explained by charge transfer to electron acceptors from Si dangling bonds postulated to be formed during photoreaction.

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