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Light‐Harvesting Antennae using the Host–Guest Chemistry of Mesoporous Organosilica
Author(s) -
Cucinotta Fabio,
Jarman Benjamin P.,
Caplan Calvin,
Cooper Sharon J.,
Riggs Helen J.,
Martinelli Jonathan,
Djanashvili Kristina,
La Mazza Emanuele,
Puntoriero Fausto
Publication year - 2018
Publication title -
chemphotochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.13
H-Index - 18
ISSN - 2367-0932
DOI - 10.1002/cptc.201700144
Subject(s) - materials science , mesoporous material , mesoporous silica , small angle x ray scattering , spectroscopy , absorption (acoustics) , fluorescence , quenching (fluorescence) , scattering , fluorescence spectroscopy , photochemistry , transmission electron microscopy , photonics , chemical engineering , nanotechnology , optoelectronics , chemistry , optics , organic chemistry , catalysis , composite material , physics , engineering , quantum mechanics
Abstract This study presents two series of new host–guest chromophoric systems, where BODIPY dyes are organized into mesoporous silica. The dyes self‐assemble with surfactants to generate micellar templates that can direct the formation of the silica networks. The materials were characterized by means of small‐angle X‐ray scattering (SAXS) and transmission electron microscopy (TEM) to elucidate their structure, and by UV/Vis absorption spectroscopy to determine their optical properties. Dye‐loaded COK‐12 materials retain an ordered structure and exhibit a green fluorescence that slightly red‐shifts and undergoes quenching as the dye loading increases. A second system is based on MCM‐41 silica and works as a polychromatic antenna, where a high energy species forms within the template and drive excitation energy transfer in timescales down to 20 ps. Such systems show promising performances for the realization of photonic antennae, to be used as sensitizers for solar cells and photocatalytic devices.