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Banasiewicz M, Deperasińska I, Makarewicz A, et al. Why vertically π-expanded imidazo[1,2-a]pyridines are weak fluorescence emitters: experimental and computational studies. Phys Chem Chem Phys. 2015;17(14):8945-50doi: 10.1039/c5cp00216h.
Banasiewicz, M., Deperasińska, I., Makarewicz, A., Firmansyah, D., Gryko, D. T., & Kozankiewicz, B. (2015). Why vertically π-expanded imidazo[1,2-a]pyridines are weak fluorescence emitters: experimental and computational studies. Physical chemistry chemical physics : PCCP, 17(14), 8945-50. https://doi.org/10.1039/c5cp00216h
Banasiewicz, Marzena, et al. "Why vertically π-expanded imidazo[1,2-a]pyridines are weak fluorescence emitters: experimental and computational studies." Physical chemistry chemical physics : PCCP vol. 17,14 (2015): 8945-50. doi: https://doi.org/10.1039/c5cp00216h
Banasiewicz M, Deperasińska I, Makarewicz A, Firmansyah D, Gryko DT, Kozankiewicz B. Why vertically π-expanded imidazo[1,2-a]pyridines are weak fluorescence emitters: experimental and computational studies. Phys Chem Chem Phys. 2015 Apr 14;17(14):8945-50. doi: 10.1039/c5cp00216h. Epub 2015 Mar 09. PMID: 25746202.
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Phys Chem Chem Phys. 2015 Apr 14;17(14):8945-50. doi: 10.1039/c5cp00216h. Epub 2015 Mar 09.

Why vertically π-expanded imidazo[1,2-a]pyridines are weak fluorescence emitters: experimental and computational studies.

Physical chemistry chemical physics : PCCP

Marzena Banasiewicz, Irena Deperasińska, Artur Makarewicz, Dikhi Firmansyah, Daniel T Gryko, Bolesław Kozankiewicz

Affiliations

  1. Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland. [email protected].

PMID: 25746202 DOI: 10.1039/c5cp00216h

Abstract

Photophysics of π-expanded analogs of imidazo[1,2-a]pyridine, a well-known heterocyclic compound, has been experimentally and theoretically studied. Two regioisomeric systems differing only in the arrangement of the benzene ring have shown different optical properties (electronic transition energies, fluorescence quantum yields and decay times). DFT calculations have been in agreement with experimental results. Low fluorescence quantum yields have been attributed to the S1→ T2 intersystem crossing channel. Additional computations predict architectures which should possess higher fluorescence quantum yields.

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