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Multi-conformational Luminescence and Phosphorescence of Few Phenazine 1,2,3-triazole Molecules

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Abstract

Dropcast films produced from blends solutions of phenazine 1,2,3-triazole molecules in very low concentrations in a 1,3-Bis (N-carbazolyl) benzene (mCP) matrix were investigated at room tem-perature. The mCP acts as an optically inert matrix, having no influence on the emission properties of the guest molecules. Its conductive properties ensure the blend films as completely organic active layers. The fluorescent and phosphorescent emissions of the guest molecules in blue, green, red and also in white are relatively intense, without the need to mix different organic materials. The excitation of the system occurs directly by the incident laser beam on the films. The steady-state spectroscopy for the blue monomer and green dimer singlet fluorescence emissions were investigated. The analysis of their temporal decays was done using a different approach based on the Exponentially Modified Gaussian function. The phosphorescent emissions of the triplet steady-states, in the orange or in the red wavelength regions, were observed to be correlated, respectively, to the formation of guest monomers or to the guest dimers singlet states.

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Acknowledgements

The authors are grateful to Brazilian agencies: FAPEMIG, CNPq and CAPES for the financial support.

Suggesting reviewers:

1 – Dr. Pablo Bianucci – Université Concordia, Montreal Canada, Pablo.bianucci@concordia.ca

2 – Emmanuelle Deleporte – Ecole Normale Supérieure, Paris, Saclay, France Emmanuelle.deleporte@ens-paris-saclay.fr

3 – Olivier Plantevin – plantevin@csnsm.in2p3.fr

4 – Robson Ferreira – Département de Physique – Ecole Normale Supérieure, Paris, Cedex 05 – France Robson.ferreira@lpmc.ens.fr

Funding

The authors are grateful to Brazilian agencies: Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) for the financial support.

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Authors and Affiliations

  1. Departamento de Física, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Minas Gerais, 31270-901, Belo Horizonte, Brazil

    Pablo B. Pinto & Luiz A. Cury

  2. Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Minas Gerais, 31270-901, Belo Horizonte, Brazil

    Kimberly C. T. da Cruz & Eufrânio N. da Silva Júnior

Authors
  1. Pablo B. Pinto
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  2. Kimberly C. T. da Cruz
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  3. Eufrânio N. da Silva Júnior
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  4. Luiz A. Cury
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by PBP, KCTC, ENSJ and LAC. The first draft of the manuscript was written by LAC and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Luiz A. Cury.

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Highlights

− Spectroscopy of few interacting molecules of phenazine 1,2,3-triazole.

– Conductive blend layers using the1,3-Bis (N-carbazolyl) benzene matrix.

– Room temperature high fluorescence and phosphorescence intensities.

– Decays of monomer and dimer singlet states.

– Exponentially Modified Gaussian function as a new approach to the decays.

– Orange or red phosphorescence due to monomer or dimer states formation.

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Pinto, P.B., da Cruz, K.C.T., da Silva Júnior, E.N. et al. Multi-conformational Luminescence and Phosphorescence of Few Phenazine 1,2,3-triazole Molecules. J Fluoresc 32, 1299–1308 (2022). https://doi.org/10.1007/s10895-022-02939-w

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  • DOI: https://doi.org/10.1007/s10895-022-02939-w

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