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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Photoluminescent properties in perylene PVD films: Influence of molecular aggregates and supramolecular arrangement

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Author(s):
Fernandes, Jose Diego [1] ; Pazin, Wallance Moreira [1] ; Aroca, Ricardo Flavio [2] ; Macedo Junior, Wagner Dias [1] ; Teixeira, Silvio Rainho [1] ; Leopoldo Constantino, Carlos Jose [1]
Total Authors: 6
Affiliation:
[1] Sao Paulo State Univ UNESP, Sch Technol & Appl Sci, Dept Phys, Presidente Prudente, SP - Brazil
[2] Univ Windsor, Windsor, ON N9B 3P4 - Canada
Total Affiliations: 2
Document type: Journal article
Source: SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY; v. 211, p. 221-226, MAR 15 2019.
Web of Science Citations: 1
Abstract

Organic thin films are at the forefront of basic studies and applications in the field of physics, chemistry, biochemistry and materials science. For example, the intrinsic supramolecular arrangement, or simply the formation of aggregates may alter the optical and electrical properties, which would impact the potential applications of the material. Here, art attempt is made to correlate the molecular structures of two perylene derivatives, bis butylimido perylene (BuPTCD) and bis phenethylimido perylene (PhPTCD), with their film formation, in particular, the supramolecular arrangement and the photoluminescent properties. Emission spectra show that the PhPTCD has a radiative efficiency (RE) higher than that for BuPTCD when both are in solutions (monomers). Complementary, regarding PVD films, UV-Vis absorption measurements reveal that PhPTCD forms, predominantly, J aggregates, which are responsible for perylene derivative emission. However, BuPTCD PVD films are found to provide higher RE than PhPTCD PVD film. This apparent controversy could be explained considering other features such as crystallinity and molecular organization. The PVD film of BuPTCD is crystalline while PhPTCD PVD film is amorphous; BuPTCD has an edge-on while PhPTCD has a face-on molecular organization in PVD films. (C) 2018 Elsevier By. All rights reserved. (AU)

FAPESP's process: 13/14262-7 - Nanostructured films from biologically-relevant materials
Grantee:Osvaldo Novais de Oliveira Junior
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 16/09633-4 - Mechanism of action of the bioactive compound Artepillin C in membrane biomimetic systems and cytoplasmic membrane of tumor cells
Grantee:Wallance Moreira Pazin
Support Opportunities: Scholarships in Brazil - Post-Doctoral