Extremely Efficient Two-Photon Absorption in Small Donor-Acceptor Substituted Organic Molecules

2015 ◽  
Author(s):  
M. T. Beels ◽  
I. Biaggio ◽  
T. Reekie ◽  
M. Chiu ◽  
F. Diederich
Keyword(s):  
Organic Molecules ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Donor Acceptor

scholarly journals Two-photon absorption and spectroscopy of the lowest two-photon transition in small donor-acceptor–substituted organic molecules

2015 ◽  
Vol 91 (4) ◽  
Author(s):  
Marten T. Beels ◽  
Ivan Biaggio ◽  
Tristan Reekie ◽  
Melanie Chiu ◽  
François Diederich
Keyword(s):  
Organic Molecules ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Photon Transition ◽  
Donor Acceptor

Two-Photon Absorption and Excited State Dynamics of Two Organic Molecules Containing Donor/Acceptor Moieties

2008 ◽  
Vol 25 (7) ◽  
pp. 2456-2459 ◽  
Author(s):  
Yan Yong-Li ◽  
Li Bo ◽  
Liu Kang-Jun ◽  
Dong Zhi-Wei ◽  
Ma Guo-Hong ◽  
...  
Keyword(s):  
Excited State ◽  
Organic Molecules ◽  
Photon Absorption ◽  
Excited State Dynamics ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Donor Acceptor

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

Strategy towards large two-photon absorption cross-sections for diketopyrrolopyrroles

2015 ◽  
Vol 3 (4) ◽  
pp. 742-749 ◽  
Author(s):  
Anna Purc ◽  
Krzysztof Sobczyk ◽  
Yusuke Sakagami ◽  
Akihiro Ando ◽  
Kenji Kamada ◽  
...  
Keyword(s):  
Cross Sections ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Donor Acceptor

Decorating diketopyrrolopyrroles with strongly electron-rich heterocycles led to donor–acceptor–donor architectures possessing two-photon brightness 850–1900 GM.

Computational design of two-photon active organic molecules for infrared responsive materials

2020 ◽  
Vol 8 (29) ◽  
pp. 9867-9873 ◽  
Author(s):  
Robert Zaleśny ◽  
Md. Mehboob Alam ◽  
Paul N. Day ◽  
Kiet A. Nguyen ◽  
Ruth Pachter ◽  
...  
Keyword(s):  
Optical Properties ◽  
Organic Molecules ◽  
Computational Design ◽  
Photon Absorption ◽  
Organic Cations ◽  
Design Rules ◽  
Responsive Materials ◽  
Two Photon Absorption ◽  
Two Photon

Aiming at proposing design rules, the mechanism of two-photon absorption is analyzed in a series of π-conjugated organic cations and their neutral precursors exhibiting aggregation-enhanced optical properties.

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