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Localized Emitting State and Energy Transfer Properties of Quadrupolar Chromophores and (Multi)Branched Derivatives


Yan, Linyin; Chen, Xudong; He, Qingguo; Wang, Yingying; Wang, Xuefei; Guo, Qianjin; Bai, Fenglian; Xia, Andong; Aumiler, Damir; Vdović, Silvije; Lin, ShengHien
Localized Emitting State and Energy Transfer Properties of Quadrupolar Chromophores and (Multi)Branched Derivatives // Journal of physical chemistry. A, 116 (2012), 34; 8693-8705 doi:10.1021/jp305407s (međunarodna recenzija, članak, znanstveni)


Naslov
Localized Emitting State and Energy Transfer Properties of Quadrupolar Chromophores and (Multi)Branched Derivatives

Autori
Yan, Linyin ; Chen, Xudong ; He, Qingguo ; Wang, Yingying ; Wang, Xuefei ; Guo, Qianjin ; Bai, Fenglian ; Xia, Andong ; Aumiler, Damir ; Vdović, Silvije ; Lin, ShengHien

Izvornik
Journal of physical chemistry. A (1089-5639) 116 (2012), 34; 8693-8705

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Intramolecular charge and energy transfer; multibranched molecules; fluorescence excitation anisotropy; intramolecular interaction

Sažetak
In order to better understand the nature of intramolecular charge and energy transfer in multibranched molecules, we have synthesized and studied the photophysical properties of a monomer quadrupolar chromophore with donor–acceptor–donor (D–A–D) electronic push–pull structure, together with its V-shaped dimer and star-shaped trimers. The comparison of steady-state absorption spectra and fluorescence excitation anisotropy spectra of these chromophores show evidence of weak interaction (such as charge and energy transfer) among the branches. Moreover, similar fluorescence and solvation behavior of monomer and branched chromophores (dimer and trimer) implies that the interaction among the branches is not strong enough to make a significant distinction between these molecules, due to the weak interaction and intrinsic structural disorder in branched molecules. Furthermore, the interaction between the branches can be enhanced by inserting π bridge spacers (−C═C– or −C≡C−) between the core donor and the acceptor. This improvement leads to a remarkable enhancement of two-photon cross-sections, indicating that the interbranch interaction results in the amplification of transition dipole moments between ground states and excited states. The interpretations of the observed photophysical properties are further supported by theoretical investigation, which reveal that the changes of the transition dipole moments of the branched quadrupolar chromophores play a critical role in observed the two-photon absorption (2PA) cross-section for an intramolecular charge transfer (ICT) state interaction in the multibranched quadrupolar chromophores.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
035-0352851-2857 - Femtosekundna laserska fizika atoma i molekula (Goran Pichler, )

Ustanove
Institut za fiziku, Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus
  • MEDLINE


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