Efficient and thermally stable non-doped red OLEDs based on a “bird-like” donor–acceptor fluorophore with aggregation induced emission enhancement and intramolecular charge transfer

2017 ◽  
Vol 5 (30) ◽  
pp. 7436-7440 ◽  
Author(s):  
Ezhakudiyan Ravindran ◽  
Narayanasastri Somanathan
Keyword(s):  
Charge Transfer ◽  
Rational Design ◽  
Intramolecular Charge Transfer ◽  
Thermally Stable ◽  
Aggregation Induced Emission ◽  
Emission Enhancement ◽  
Donor Acceptor ◽  
Red Oleds

The rational design of an efficient and thermally stable non-doped red fluorophore material with tunable AIEE and ICT characteristics triggers enhanced OLED performances.

scholarly journals N-Substitution of acridone with electron-donating groups: crystal packing, intramolecular charge transfer and tuneable aggregation induced emission

RSC Advances ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 7092-7098 ◽  
Author(s):  
Renfei Liu ◽  
Guanxing Zhu ◽  
Gang Zhang
Keyword(s):  
Charge Transfer ◽  
Transfer Process ◽  
Intramolecular Charge Transfer ◽  
Crystal Packing ◽  
Charge Transfer Process ◽  
Aggregation Induced Emission ◽  
Donor Acceptor ◽  
Electron Donating Groups

Triphenylamine functionalized acridone leads to a donor–acceptor system with intramolecular charge transfer process and tuneable aggregation induced enhanced emission.

Pyrrolo[2,3-b]quinoxaline with 2-(2-aminoethyl)pyridine chain highly selective fluorescent receptor for Zn2+ exhibiting a dual fluorescence and AIEE in crystalline state

CrystEngComm ◽  
2015 ◽  
Vol 17 (3) ◽  
pp. 498-502 ◽  
Author(s):  
Katarzyna Ostrowska ◽  
Łukasz Dudek ◽  
Jarosław Grolik ◽  
Marlena Gryl ◽  
Katarzyna Stadnicka
Keyword(s):  
Charge Transfer ◽  
Solid State ◽  
Crystalline State ◽  
Intramolecular Charge Transfer ◽  
Zinc Ion ◽  
Dual Fluorescence ◽  
Aggregation Induced Emission ◽  
Emission Enhancement

The article describes the synthesis of selective dual emissive intramolecular charge transfer (ICT) receptor for zinc ion in acetonitrile, exhibiting aggregation induced emission enhancement (AIEE) in solid state.

scholarly journals Rational Design of TADF Polymers Using a Donor-Acceptor Monomer with Enhanced TADF Efficiency Induced by the Energy Alignment of Charge Transfer and Local Triplet Excited States

2016 ◽  
Vol 4 (4) ◽  
pp. 597-607 ◽  
Author(s):  
Roberto S. Nobuyasu ◽  
Zhongjie Ren ◽  
Gareth C. Griffiths ◽  
Andrei S. Batsanov ◽  
Przemyslaw Data ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Excited States ◽  
Rational Design ◽  
Donor Acceptor ◽  
Triplet Excited States

scholarly journals Tuning of Hyperpolarizability, One- and Two-Photon Absorption of D-A and D-A-A Type Intramolecular Charge Transfer Based Sensors

2019 ◽  
Author(s):  
Pralok K. Samanta ◽  
Md Mehboob Alam ◽  
Ramprasad Misra ◽  
Swapan K. Pati
Keyword(s):  
Charge Transfer ◽  
Gas Phase ◽  
Density Functional ◽  
Intramolecular Charge Transfer ◽  
Photon Absorption ◽  
First Hyperpolarizability ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Nlo Response ◽  
Donor Acceptor

Solvents play an important role in shaping the intramolecular charge transfer (ICT) properties of π-conjugated molecules, which in turn can affect their one-photon absorption (OPA) and two-photon absorption (TPA) as well as the static (hyper)polarizabilities. Here, we study the effect of solvent and donor-acceptor arrangement on linear and nonlinear optical (NLO) response properties of two novel ICT-based fluorescent sensors, one consisting of hemicyanine and dimethylaniline as electron withdrawing and donating groups (molecule 1), respectively and its boron-dipyrromethene (BODIPY, molecule 2)-fused counterpart (molecule 3). Density functional theoretical (DFT) calculations using long-range corrected CAM-B3LYP and M06-2X functionals, suitable for studying properties of ICT molecules, are employed to calculate the desired properties. The dipole moment (µ) as well as the total first hyperpolarizability (β<sub>total</sub>) of the studied molecules in the gas phase is dominantly dictated by the component in the direction of charge transfer. The ratios of vector component of first hyperpolarizability (β<sub>vec</sub>) to β<sub>total</sub> also reveal unidirectional charge transfer process. The properties of the medium significantly affect the OPA, hyperpolarizability and TPA properties of the studied molecules. Time dependent DFT (TDDFT) calculations suggest interchanging between two lowest excited states of molecule 3 from the gas phase to salvation. The direction of charge polarization and dominant transitions among molecular orbitals involved in the OPA and TPA processes are studied. The results presented are expected to be useful in tuning the NLO response of many ICT-based chromophores, especially those with BODIPY acceptors.<br>

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