NANOSCOPIC REACTIVITY IN CHEMICAL AND PHOTOCHEMICAL SYSTEMS

• Grant number: 21/01718-9
• Support Opportunities: Regular Research Grants
• Start date: July 01, 2021
• End date: December 31, 2023
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Marcelo Henrique Gehlen
• Grantee: Marcelo Henrique Gehlen
• Host Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• City of the host institution: São Carlos

Abstract

Chemical and photochemical processes including catalytic organic reactions (Knoevenagel amino-catalysis, Debus-Radziszewski acid catalysis and Suzuki-Miyaura palladium catalysis,) forming fluorescent dyes are investigated in mesoscopic, nanoscopic and single molecule level by using advanced super-resolution optical microscopy combined with stochastic analysis time-series of the observed fluorescence intermittency. Those chemical reactions and products will be used to chemically modify carbon nano-hybrids such as graphene and reduced graphene oxide as well as thin films and quantum wells of perovskites. Their excited state dynamics and spectroscopy leading to photoinduced charge separation will be investigated and optimized owing their possible applications in optical and photochemical devices including photovoltaic solar cells and photocatalysts. (AU)

Scientific publications

(4)

(The scientific publications listed on this page originate from the Web of Science or SciELO databases. Their authors have cited FAPESP grant or fellowship project numbers awarded to Principal Investigators or Fellowship Recipients, whether or not they are among the authors. This information is collected automatically and retrieved directly from those bibliometric databases.)

REIS, IZADORA FONSECA; FOLTRAN, LARISSA SCHUMEKEL; LAUER, MILENA HELMER; GEHLEN, MARCELO HENRIQUE; DREKENER, ROBERTA LOPES; CORREIA, CARLOS ROQUE DUARTE. Reactive Phenanthrene Derivatives as Markers of Amino Groups in Fluorescence Microscopy of Surface Modified Micro-Zeolite L. Journal of Fluorescence, v. 31, n. 5, JUL 2021. (21/01718-9)

MOURA, HENRIQUE LUIZ BERTHAULT; GEHLEN, MARCELO HENRIQUE. Modulation of the fluorescence of graphene oxide micro-flakes with addition of peripheral benzimidazole group. Photochemistry and Photobiology, v. 101, n. 4, p. 8-pg., 2025-07-01. (21/01718-9)

REIS, IZADORA F.; GEHLEN, MARCELO H.. Exploring the Dynamics of Suzuki-Miyaura Cross-Coupling Reactions via Single-Molecule Fluorescence Microscopy: Catalytic Efficiency from SM-TOF Measurements. Journal of Physical Chemistry C, v. 129, n. 8, p. 7-pg., 2025-02-18. (21/01718-9)

REIS, IZADORA F.; GEHLEN, MARCELO H.. Single-Molecule Catalysis in the Palladium Cross-Coupling Reaction Cycle. Journal of Physical Chemistry Letters, v. 15, n. 9, p. 7-pg., 2024-02-22. (21/01718-9)