Charge transfer induced enhancement of near-IR two-photon absorption of 5,15-bis(azulenylethynyl) zinc(ii) porphyrins

2007 ◽  
pp. 2479 ◽  
Author(s):  
Kil Suk Kim ◽  
Su Bum Noh ◽  
Takayuki Katsuda ◽  
Shuji Ito ◽  
Atsuhiro Osuka ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Near Ir

Small molecules of chalcone derivatives with high two-photon absorption activities in the near-IR region

2016 ◽  
Vol 4 (15) ◽  
pp. 3256-3267 ◽  
Author(s):  
Jingyun Tan ◽  
Yujin Zhang ◽  
Meirong Zhang ◽  
Xiaohe Tian ◽  
Yiming Wang ◽  
...  
Keyword(s):  
Small Molecules ◽  
Photon Absorption ◽  
Structure Property ◽  
Two Photon Absorption ◽  
Chalcone Derivatives ◽  
Two Photon ◽  
Property Relationship ◽  
Near Ir ◽  
Structure Property Relationship

Six thiophene-based chalcone derivatives were synthesized, and their structure–property relationship was investigated systematically. Small molecules as they are, they have showed favorable Φ and σ values in the near-IR region.

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>

Thiophene-based pyridine derivatives: synthesis, crystal structures, two-photon absorption properties and bio-imaging applications in the near-IR region

2016 ◽  
Vol 40 (10) ◽  
pp. 8809-8814 ◽  
Author(s):  
Shasha Xu ◽  
Yingzhong Zhu ◽  
Rui Li ◽  
Jian Su ◽  
Shengli Li ◽  
...  
Keyword(s):  
Cross Sections ◽  
High Stability ◽  
Photon Absorption ◽  
Pyridine Derivatives ◽  
Absorption Properties ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Near Ir ◽  
Bio Imaging ◽  
Low Cytotoxicity

Two novel D–π–A structural chromophores showing large 2PA active cross-sections, low cytotoxicity and high stability in near-IR bio-imaging.

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
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