New Coumarin Dipicolinate Europium Complexes with a Rich Chemical Speciation and Tunable Luminescence

Molecules

Dalila Iacopini¹  Sebastiano Di Pietro²  Valeria Di Bussolo²  Mauro Pineschi²  Giovanni Signore³  Aldo Moscardini⁴  Ranieri Bizzarri⁴ 

[1] Department of Chemistry and Industrial, University of Pisa, Via G. Moruzzi 3, 56126 Pisa, Italy;Department of Pharmacy, University of Pisa, Via Bonanno Pisano 6, 56126 Pisa, Italy;Fondazione Pisana per la Scienza, via F. Giovannini 13, 56017 San Giuliano Terme (PI), Italy;NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, Piazza San Silvestro 12, 56127 Pisa, Italy;

关键词: europium complex;    coumarin;    dipicolinate;    chemical speciation;    luminescence;   

DOI  :  10.3390/molecules26051265

来源: DOAJ

【 摘 要 】

Europium (III) luminescent chelates possess intrinsic photophysical properties that are extremely useful in a wide range of applications. The lack of examples of coumarin-based lanthanide complexes is mainly due to poor photo-sensitization attempts. However, with the appeal of using such a versatile scaffold as antenna, especially in the development of responsive molecular probes, it is worth the effort to research new structural motifs. In this work, we present a series of two new tris coumarin-dipicolinate europium (III) complexes, specifically tailored to be either a mono or a dual emitter, tuning their properties with a simple chemical modification. We also encountered a rich chemical speciation in solution, studied in detail by means of paramagnetic NMR and emission spectroscopy.

【 授权许可】

Unknown