Jump to main content
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Laws & Regulations
About EPA
Health & Environmental Research Online (HERO)
Contact Us
Print
Feedback
Export to File
Search:
This record has one attached file:
Add More Files
Attach File(s):
Display Name for File*:
Save
Citation
Tags
HERO ID
2284455
Reference Type
Journal Article
Title
Oriented Thin Films of a Benzodithiophene Covalent Organic Framework
Author(s)
Medina, DD; Werner, V; Auras, F; Tautz, R; Dogru, M; Schuster, J; Linke, S; Döblinger, M; Feldmann, J; Knochel, P; Bein, T
Year
2014
Is Peer Reviewed?
1
Journal
ACS Nano
ISSN:
1936-0851
EISSN:
1936-086X
Volume
8
Issue
4
Page Numbers
4042-4052
Language
English
PMID
24559375
DOI
10.1021/nn5000223
Web of Science Id
WOS:000334990600103
Abstract
A mesoporous electron-donor covalent organic framework based on a benzodithiophene core, BDT-COF, was obtained through condensation of a benzodithiophene-containing diboronic acid and hexahydroxytriphenylene (HHTP). BDT-COF is a highly porous, crystalline and thermally stable material, which can be handled in air. Highly porous, crystalline oriented thin BDT-COF films were synthesized from solution on different polycrystalline surfaces, indicating the generality of the synthetic strategy. The favorable orientation, crystallinity, porosity and the growth mode of the thin BDT-COF films were studied by means of X-ray diffraction (XRD), 2D grazing incidence diffraction (GID), transmission and scanning electron microscopy (TEM, SEM) and krypton sorption. The highly porous thin BDT-COF films were infiltrated with soluble fullerene derivatives, such as [6,6]-phenyl C61 butyric acid methyl ester (PCBM), to obtain an interpenetrated electron-donor/acceptor host-guest system. Light-induced charge transfer from the BDT-framework to PCBM acceptor molecules was indicated by efficient photoluminescence quenching. Moreover, we monitored the dynamics of photo-generated hole-polarons via transient absorption spectroscopy. This work represents a combined study of the structural and optical properties of highly oriented mesoporous thin COF films serving as host for the generation of periodic interpenetrated electron-donor and electron-acceptor systems.
Tags
IRIS
•
n-Butanol
Database searches
Pubmed
Database Searches - March 2014 (private)
Pubmed - 3/2014
Excluded (not pertinent)
Not chemical specific
Home
Learn about HERO
Using HERO
Search HERO
Projects in HERO
Risk Assessment
Transparency & Integrity