Donor-acceptor architectures of tetraphenylethene linked aza-BODIPYs: Synthesis, crystal structure, energy transfer and computational studies

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dc.contributor.author Balsukuri, Naresh
dc.contributor.author Manav, Neha
dc.contributor.author Lone, Mohsin Y.
dc.contributor.author Mori, Shigeki
dc.contributor.author Das, Arpita
dc.contributor.author Sen, Pratik
dc.contributor.author Gupta, Iti
dc.date.accessioned 2020-02-22T06:10:46Z
dc.date.available 2020-02-22T06:10:46Z
dc.date.issued 2020-05
dc.identifier.citation Balsukuri, Naresh; Manav, Neha; Lone, Mohsin Y.; Mori, Shigeki; Das, Arpita; Sen, Pratik and Gupta, Iti, "Donor-acceptor architectures of tetraphenylethene linked aza-BODIPYs: Synthesis, crystal structure, energy transfer and computational studies", Dyes and Pigments, DOI: 10.1016/j.dyepig.2020.108249, vol. 176, May 2020. en_US
dc.identifier.issn 0143-7208
dc.identifier.issn 1873-3743
dc.identifier.uri https://doi.org/10.1016/j.dyepig.2020.108249
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/5152
dc.description.abstract This work is focused on the design and synthesis of donor-acceptor pairs comprising of aza-BODIPY and tetraphenylethene (TPE) fluorogens with large pseudo Stokes shifts (386�424 nm). Femtosecond transient absorption spectroscopy, single crystal X-ray technique and TD-DFT studies were used to get more insight about their spectral behavior. As compared to the tetra-phenylaza-BODIPY, the four aza-BODIPYs exhibited 50�90 nm red shifted absoprtion and emission spectra. When the donor-acceptor architectures were excited at 300 nm, the aza-BODIPY unit emitted strong fluorescence in red region. This suggested an intramolecular energy transfer between donor (TPE) and the aza-BODIPY acceptor; with 81�90% energy transfer efficiencies. Femtosecond transient absorption studies also supported energy transfer process in the molecules, with 3.7 ps time constant associated with it. Aggregation studies in THF/n-heptane solution showed hypsochromic shifts in the aggregated form; X-ray packing structures indicated H-type aggregates (slip angle > 54.7�) in the solid state. Scanning electron microscopy (SEM) measurement revealed 200�700 nm size sphere shaped structures in the aggregated forms.
dc.description.statementofresponsibility by Naresh Balsukuri, Neha Manav, Mohsin Y. Lone, Shigeki Mori, Aritra Das, Pratik Sen and Iti Guptaa
dc.language.iso en_US en_US
dc.publisher Elsevier en_US
dc.subject Aza-BODIPY en_US
dc.subject Donor-acceptor system en_US
dc.subject Aggregation studies en_US
dc.subject Energy transfer en_US
dc.subject Pseudo Stokes shifts en_US
dc.subject TD-DFT en_US
dc.subject Transient absorption en_US
dc.title Donor-acceptor architectures of tetraphenylethene linked aza-BODIPYs: Synthesis, crystal structure, energy transfer and computational studies en_US
dc.type Article en_US
dc.relation.journal Dyes and Pigments


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