Spontaneous Symmetry Breaking Facilitates Metal-to-Ligand Charge Transfer: A Quantitative Two-Photon Absorption Study of Ferrocene-phenyleneethynylene Oligomers

2018 ◽  
Vol 9 (8) ◽  
pp. 1893-1899 ◽  
Author(s):  
Alexander Mikhaylov ◽  
Merle Uudsemaa ◽  
Aleksander Trummal ◽  
Eduardo Arias ◽  
Ivana Moggio ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Symmetry Breaking ◽  
Spontaneous Symmetry Breaking ◽  
Photon Absorption ◽  
Absorption Study ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Ligand Charge Transfer

Two-photon absorption spectra of a near-infrared 2-azaazulene polymethine dye: solvation and ground-state symmetry breaking

2013 ◽  
Vol 15 (20) ◽  
pp. 7666 ◽  
Author(s):  
Honghua Hu ◽  
Olga V. Przhonska ◽  
Francesca Terenziani ◽  
Anna Painelli ◽  
Dmitry Fishman ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Absorption Spectra ◽  
Ground State ◽  
Near Infrared ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Polymethine Dye

scholarly journals Quantitative description of MLCT transitions in ruthenium polypyridyl complexes probed by two-photon absorption spectroscopy

2018 ◽  
Vol 190 ◽  
pp. 03012
Author(s):  
Charles W. Stark ◽  
M. Rammo ◽  
K. Petritšenko ◽  
J. Pahapill ◽  
A. Mikhaylov ◽  
...  
Keyword(s):  
Cross Section ◽  
Quantitative Description ◽  
Photon Absorption ◽  
Charge Transfer Transition ◽  
Ruthenium Polypyridyl ◽  
Polypyridyl Complexes ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Ligand Charge Transfer ◽  
Ruthenium Polypyridyl Complexes

Quantitative two-photon absorption (2PA) cross section and 2PA spectrum measurements were used to determine the molecular electric dipole change in the metal-to-ligand charge-transfer transition of ruthenium(II) tris-complexes of 2,2’-bipyridine ([Ru(bpy)3]2+) and 1,10-phenanthroline ([Ru(phen)3]2+) in several solvents.

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

scholarly journals Symmetry Breaking in Pyrrolo[3,2-b ]pyrroles: Synthesis, Solvatofluorochromism and Two-photon Absorption

2017 ◽  
Vol 12 (14) ◽  
pp. 1736-1748 ◽  
Author(s):  
Łukasz G. Łukasiewicz ◽  
Hye Gun Ryu ◽  
Alexander Mikhaylov ◽  
Cloé Azarias ◽  
Marzena Banasiewicz ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon
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