Novel A–(π–D–π–A)1–3 branched fluorophores displaying high two-photon absorption

RSC Advances ◽  
2016 ◽  
Vol 6 (52) ◽  
pp. 46853-46863 ◽  
Author(s):  
Zhi-Bin Cai ◽  
Hai-Min Shen ◽  
Mao Zhou ◽  
Sheng-Li Li ◽  
Yu-Peng Tian
Keyword(s):  
Charge Transfer ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
End Groups

Novel A–(π–D–π–A)3 compounds bearing pyridine end groups are apparently effective in achieving large two-photon responses owing to strong charge transfer.

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>

scholarly journals Photoinduced charge transfer in quasi-one-dimensional polymers in two-photon absorption

RSC Advances ◽  
2020 ◽  
Vol 10 (55) ◽  
pp. 33288-33298 ◽  
Author(s):  
Pen-ji Yan ◽  
Xijiao Mu ◽  
Jun Dong ◽  
Mengtao Sun
Keyword(s):  
Charge Transfer ◽  
Photon Absorption ◽  
Photoinduced Charge Transfer ◽  
One Dimensional ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Photoinduced Charge

In this work, we theoretically investigate the structure and the transition characteristics of one- (OPA) and two-photon absorption (TPA) spectra of different length neutral and charged thiophene polymers

Intermolecular Charge-Transfer Interactions Facilitate Two-Photon Absorption in Styrylpyridine-Tetracyanobenzene Cocrystals

2017 ◽  
Vol 56 (27) ◽  
pp. 7831-7835 ◽  
Author(s):  
Lingjie Sun ◽  
Weigang Zhu ◽  
Wei Wang ◽  
Fangxu Yang ◽  
Congcong Zhang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Intermolecular Charge Transfer

Enhancement of two photon absorption properties and intersystem crossing by charge transfer in pentaaryl boron-dipyrromethene (BODIPY) derivatives

2016 ◽  
Vol 18 (19) ◽  
pp. 13546-13553 ◽  
Author(s):  
B. Küçüköz ◽  
G. Sevinç ◽  
E. Yildiz ◽  
A. Karatay ◽  
F. Zhong ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Photon Absorption ◽  
Intersystem Crossing ◽  
Absorption Properties ◽  
Pump Probe ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Boron Dipyrromethene ◽  
Probe Spectroscopy

Indication of charge transfer and an intersystem crossing mechanism for the B4 compound by using ultrafast pump probe spectroscopy.

Photophysical and two-photon absorption properties of protonation-induced tribranched chromophore having 1,3,5-triazine core and pyrrole end-groups

2011 ◽  
Vol 161 (9-10) ◽  
pp. 783-788 ◽  
Author(s):  
Li Liu ◽  
Zhiqiang Zhou ◽  
Jieping Shi ◽  
Zeyu Liu ◽  
Changgui Lu ◽  
...  
Keyword(s):  
Photon Absorption ◽  
Absorption Properties ◽  
Two Photon Absorption ◽  
Two Photon ◽  
End Groups
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