scholarly journals Solvatofluorochromic, non-centrosymmetric π-expanded diketopyrrolopyrrole

2016 ◽  
Vol 14 (6) ◽  
pp. 2025-2033 ◽  
Author(s):  
Marek Grzybowski ◽  
Artur Jeżewski ◽  
Irena Deperasińska ◽  
Daniel H. Friese ◽  
Marzena Banasiewicz ◽  
...  
Keyword(s):  
Optical Properties ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Donor Acceptor ◽  
Linear Optical Properties ◽  
Linear Optical

A donor–acceptor type π-expanded diketopyrrolopyrrole behaves as non-centrosymmetric as far as linear optical properties are concerned but as ‘pseudo-symmetric’ for two-photon absorption.

scholarly journals Photophysics of chlorin e6: from one- and two-photon absorption to fluorescence and phosphorescence

RSC Advances ◽  
2017 ◽  
Vol 7 (18) ◽  
pp. 10992-10999 ◽  
Author(s):  
Hugo Gattuso ◽  
Antonio Monari ◽  
Marco Marazzi
Keyword(s):  
Optical Properties ◽  
Singlet Oxygen ◽  
Photon Absorption ◽  
Chlorin E6 ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Non Linear ◽  
Linear Optical Properties ◽  
Linear Optical ◽  
Fluorescence And Phosphorescence

Linear and non-linear optical properties of a known photosensitizer producing singlet oxygen, chlorin e6, have been studied, including dynamics effects.

Three Asymmetrical Conjugated D-π-D' Sulfur-Containing Chromophores with a Focus on Two-Photon Absorption

2011 ◽  
Vol 64 (2) ◽  
pp. 174 ◽  
Author(s):  
Zhang-Jun Hu ◽  
Rui-Long Zhang ◽  
Ping-Ping Sun ◽  
Lin Li ◽  
Jie-Ying Wu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Cross Sections ◽  
Sulfur Atom ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Synthetic Strategy ◽  
Linear Optical Properties ◽  
Styrene Derivatives ◽  
Sulfur Containing

Three novel asymmetrical D-π-D′ type sulfur-containing chromophores, (E)-4-(4-(benzylthio)styryl)-N,N-diethylbenzenamine (S1), (E)-4-(4-(tert-butylthio)styryl)-N,N-diethylbenzenamine (S2) and (E)-4-(4-(thio)styryl)-N,N-diethylbenzenamine (S3), were synthesized and characterized. Two kinds of substituents and hydrogen were introduced into the three different chromophores to investigate the influence of electron distribution on the sulfur atom. Meanwhile, a simple synthetic strategy of π-conjugated 4-(thio)styrene derivatives was performanced successfully. Linear and non-linear optical properties of S1, S2 and S3 were investigated both experimentally and theoretically. The optical properties indicate that they all have obvious characteristics of asymmetrical dipole molecules. The measured maximum two-photon cross-sections of S1–3 are 79, 57 and 19 GM (Goeppert-Mayer), respectively. It shows that the different substituents on the sulfur atom in molecules S1–3 lead to different electronic structures, which affect the optical properties. In these structures, the aromatic benzyl substituent (in S1) is superior for optimizing two-photon activity in the designed molecular framework.

Non-linear optical properties of gold quantum clusters. The smaller the better

Nanoscale ◽  
2014 ◽  
Vol 6 (22) ◽  
pp. 13572-13578 ◽  
Author(s):  
Isabelle Russier-Antoine ◽  
Franck Bertorelle ◽  
Marin Vojkovic ◽  
Driss Rayane ◽  
Estelle Salmon ◽  
...  
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
New Method ◽  
Photon Absorption ◽  
Nlo Properties ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Non Linear ◽  
Quantum Clusters ◽  
Linear Optical Properties

We developed a new method for synthesizing atomically monodisperse Au15 nanoclusters stabilized with glutathione molecules, and investigated their nonlinear optical (NLO) properties after two-photon absorption.

ChemInform Abstract: Quadratic Non-Linear Optical Properties of Some Donor-Acceptor Substituted Thiophenes (I)-(VI).

ChemInform ◽  
2010 ◽  
Vol 26 (25) ◽  
pp. no-no
Author(s):  
M. G. HUTCHINGS ◽  
I. FERGUSON ◽  
D. J. MCGEEIN ◽  
J. O. MORLEY ◽  
J. ZYSS ◽  
...  
Keyword(s):  
Optical Properties ◽  
Non Linear ◽  
Donor Acceptor ◽  
Linear Optical Properties ◽  
Linear Optical

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>

Multiple Intramolecular Charge Transfers in Multimodular Donor–Acceptor Chromophores with Large Two-Photon Absorption

2020 ◽  
Vol 124 (45) ◽  
pp. 24631-24643
Author(s):  
Yogajivan Rout ◽  
Alessio Cesaretti ◽  
Elena Ferraguzzi ◽  
Benedetta Carlotti ◽  
Rajneesh Misra
Keyword(s):  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Donor Acceptor
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