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Luminescent Supramolecular Heterometallic Macrocycles and their Encapsulation on Cholate Gels
Author(s) -
Gavara Raquel,
Mateos Javier,
Sabaté Ferran,
Belda Raquel,
Llinares José Miguel,
GarcíaEspaña Enrique,
Rodríguez Laura
Publication year - 2018
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.201800697
Subject(s) - chemistry , supramolecular chemistry , aqueous solution , chromophore , metal , luminescence , self healing hydrogels , pyridine , ligand (biochemistry) , coordination complex , self assembly , crystallography , stereochemistry , polymer chemistry , photochemistry , crystal structure , medicinal chemistry , organic chemistry , physics , biochemistry , receptor , optoelectronics
The metal complex formed by coordination of Zn II to 1,7‐bis(4‐methylpyridine)‐4‐(2‐naphthylmethyl)‐1,4,7‐triazaheptane ( ZnL 2+ ) was reacted in aqueous solution with [Pd(NO 3 ) 2 (en)] and [Pt(NO 3 ) 2 (en)] salts to form the self‐assembled heterometallic macrocycles [Zn 2 L 2 Pd 2 (en) 2 ] 8+ and [Zn 2 L 2 Pt 2 (en) 2 ] 8+ , respectively. Pd II and Pt II ‐coordination modulates the original emission of ZnL 2+ arising from the presence of the naphthalene chromophore and the formation of the macrocycles can be monitored due to the PET process occurring with coordination of Pd II and Pt II to the pyridine units of ZnL 2+ . Additionally, several studies reveal that these heteromacrocycles can be encapsulated in Zn II ‐cholate hydrogels giving rise to soft materials with tunable emissive properties. Preliminary analysis show also that the addition of the metallic species in micromole concentration to the cholate hydrogels resulted in an improved mechanical strength of the final materials.