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Thermal and Mechanochemical Syntheses of Luminescent Mononuclear Copper(I) Complexes
Author(s) -
Liang Panyi,
Kobayashi Atsushi,
Hasegawa Tatsuya,
Yoshida Masaki,
Kato Masako
Publication year - 2017
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201700734
Subject(s) - chemistry , isoquinoline , ligand (biochemistry) , triphenylphosphine , solvent , luminescence , photochemistry , iodide , chlorobenzene , photoluminescence , polymer chemistry , inorganic chemistry , stereochemistry , organic chemistry , biochemistry , physics , receptor , optoelectronics , optics , catalysis
Mononuclear Cu I iodide complexes, [CuI(PPh 3 ) 2 L] {PPh 3 = triphenylphosphine; L = 4‐aminoisoquinoline (4‐aiq) ( 2 ), 5‐aminoisoquinoline (5‐aiq) ( 3 ), and 5‐nitroisoquinoline (niq) ( 4 )}, were prepared by three different methods: normally used reactions in the solution state, mechanochemical synthesis, and newly developed solvent‐free thermal synthesis. Although no solvent was required for the mechanochemical synthesis of the parent complex [CuI(PPh 3 ) 2 (iq)] ( 1 ; iq = isoquinoline), a minimal amount of assisting solvent (PhCN) was required for the mechanochemical syntheses of the three functionalized isoquinoline complexes. The amino‐functionalized isoquinoline complexes were successfully synthesized by heating the ground mixture of three types of starting materials at ca. 100 °C, where the PPh 3 ligand melted to promote complex formation by acting as the ligand and the solvent. The emission properties strongly depend on the L ligand: Complexes 2 and 3 showed vibronic emission spectra originating from the 3 ππ* excited state localized on the L ligand, whereas complex 4 did not show any emission in the visible region.