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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/8462
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dc.contributor.authorTejkiran, P J-
dc.contributor.authorTeja, M S Brahma-
dc.contributor.authorKumar, P Sai Siva-
dc.contributor.authorSankar, Pranitha-
dc.contributor.authorPhilip, Reji-
dc.contributor.authorNaveen, S-
dc.contributor.authorLokanath, N K-
dc.contributor.authorRao, G Nageswara-
dc.date.accessioned2025-08-28T04:19:17Z-
dc.date.available2025-08-28T04:19:17Z-
dc.date.issued2016-03-
dc.identifier.citationJournal of Photochemistry and Photobiology A: Chemistry, 2016, Vol.324, p33-39en_US
dc.identifier.issn1010-6030-
dc.identifier.issn1873-2666 (online)-
dc.identifier.urihttp://hdl.handle.net/2289/8462-
dc.descriptionOpen Access.en_US
dc.description.abstractWith the growing interest for organic molecules in Nonlinear Optical (NLO) applications, we have synthesized nine novel thienyl chalcones based on the D-A-π-D design. In order to establish the identity, these have been characterized in detail. Having followed the design based synthetic route, we have focused on two prime criteria for comparison; namely second harmonic generation (SHG) and non-linear absorption. In this work the role of the electron withdrawing groups, electron donating groups and extended conjugation, have been extensively studied vis-à-vis the NLO properties. The change in these properties by virtue of the molecular structure has been elucidated in this work as the structure activity relationship. Optical nonlinearity is studied using ultrafast (100 fs) laser pulses at 800 nm, employing the open aperture Z-scan technique. The compounds exhibit large effective three-photon absorption (3PA) coefficients, in the order of 10−28 m3/W2. These observations show that these compounds possess potential for application in all-optical limiting and switching devices.en_US
dc.language.isoenen_US
dc.publisherJournal of Photochemistry and Photobiology A: Chemistryen_US
dc.relation.urihttp://dx.doi.org/10.1016/j.jphotochem.2016.03.009en_US
dc.rights2016 Elsevier B.V.en_US
dc.subjectThienyl chalconesen_US
dc.subjectZ-Scanen_US
dc.subjectNonlinear optical properties (NLO)en_US
dc.subjectThree photon absorptionen_US
dc.subjectSecond harmonic generation (SHG)en_US
dc.titleD-A-π-D Synthetic approach for thienyl chalcones – NLO – a structure activity studyen_US
dc.typeArticleen_US
dc.additional• Based on D-A-π-D SYNTHETIC APPROACH we could synthesize nine novel thienyl chalcones with high effective 3 photon absorption coefficient (3 PA) of order 10−28 m3/W2. • Of these, T-CHL-NDM was found to have the highest 3PA coefficient of about 105.0 × 10−28 m3/W2. • Structure activity relationship based on the functional group vis-à-vis its NLO properties was established, and making minor modifications in the structure of the chalcones, desired 3PA values could be obtained. • Structures of all compounds have been characterized adequately. • These compounds will be useful in various applications like optical devices, communications, etc.en_US
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