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2,5‐Dimethoxybenzene‐1,4‐dicarboxaldehyde: An Emissive Organic Crystal and Highly Efficient Fluorescent Waveguide
Author(s) -
Hayashi Shotaro,
Koizumi Toshio,
Kamiya Natsumi
Publication year - 2019
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201800597
Subject(s) - chemistry , intramolecular force , full width at half maximum , benzene , fluorescence , molecule , crystal (programming language) , photochemistry , single crystal , aldehyde , hydrogen bond , analytical chemistry (journal) , crystallography , optoelectronics , stereochemistry , organic chemistry , optics , catalysis , materials science , physics , computer science , programming language
To identify the simplest organic structure for an emitter, we focused on 2,5‐dimethoxybenzene‐1,4‐dicarboaldehyde. This symmetric molecule has a very low molecular weight (MW=194), a single benzene unit, and consists of only three elements (H, C and O). It forms highly efficient and pure emitting crystals (λem=499 nm, Φ F =0.42, FWHM=42 nm) due to the rigid structure based on the single benzene framework and four intramolecular hydrogen bonds between electron‐donating methoxy and electron‐accepting aldehyde groups. This crystal acts as a good optical waveguide with pure green emission (FWHM=34 nm) and very low loss coefficient (0.00120 dB/μm).