TY - JOUR
T1 - Syntheses, Crystal Structures and Photophysical Aspects of Discrete and Polymeric Azido-Bridged Zinc(II) and Cadmium(II) Complexes
T2 - Sensing Properties and Structural Resemblance
AU - Roy, Shuvayan
AU - Bhattacharya, Sagarika
AU - Mohanta, Sasankasekhar
N1 - Publisher Copyright:
© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2017/12/1
Y1 - 2017/12/1
N2 - The work in this report presents syntheses, characterization, crystal structures and steady state and time resolved photophysical properties of four compounds of composition [ZnII 3L1 2(N3)4] (1), [CdII 3L2 2(N3)4]n (2), [ZnII 2L2(N3)3]n (3) and [CdII 2L1(N3)3]n (4), where HL1 and HL2 are the Schiff base ligands, obtained on 1:1 condensation of 3-ethoxysalicylaldehyde (for HL1)/3-methoxysalicylaldehyde (for HL2) and N,N,2,2-tetramethyl-1,3-propanediamine. Compound 1 is a discrete trizinc(II) system, while the other three compounds are one-dimensional coordination polymers, where the building units are, respectively, tricadmium(II), dizinc(II) and dicadmium(II) moieties. The nuclearities of the cores in the ZnII–azido compound from HL1 and the CdII–azido compound from HL2 are similar (1 and 2 are trinuclear) and, similarly, the ZnII–azido compound from HL2 and the CdII–azido compound from HL1 are similar (3 and 4 are dinuclear), revealing an unusual structural resemblance of two metal ions of two different rows in the periodic table as the function of slight change in the ligand periphery (OEt in HL1, OMe in HL2). The steady state/time-resolved photophysical properties reveal that cadmium(II) enhances slightly but zinc(II) enhances appreciably the fluorescence of the Schiff base ligands HL1 and HL2. It has been found that both HL1 and HL2 are fluorogenic sensors of zinc(II).
AB - The work in this report presents syntheses, characterization, crystal structures and steady state and time resolved photophysical properties of four compounds of composition [ZnII 3L1 2(N3)4] (1), [CdII 3L2 2(N3)4]n (2), [ZnII 2L2(N3)3]n (3) and [CdII 2L1(N3)3]n (4), where HL1 and HL2 are the Schiff base ligands, obtained on 1:1 condensation of 3-ethoxysalicylaldehyde (for HL1)/3-methoxysalicylaldehyde (for HL2) and N,N,2,2-tetramethyl-1,3-propanediamine. Compound 1 is a discrete trizinc(II) system, while the other three compounds are one-dimensional coordination polymers, where the building units are, respectively, tricadmium(II), dizinc(II) and dicadmium(II) moieties. The nuclearities of the cores in the ZnII–azido compound from HL1 and the CdII–azido compound from HL2 are similar (1 and 2 are trinuclear) and, similarly, the ZnII–azido compound from HL2 and the CdII–azido compound from HL1 are similar (3 and 4 are dinuclear), revealing an unusual structural resemblance of two metal ions of two different rows in the periodic table as the function of slight change in the ligand periphery (OEt in HL1, OMe in HL2). The steady state/time-resolved photophysical properties reveal that cadmium(II) enhances slightly but zinc(II) enhances appreciably the fluorescence of the Schiff base ligands HL1 and HL2. It has been found that both HL1 and HL2 are fluorogenic sensors of zinc(II).
KW - Coordination polymer
KW - Fluorescence sensor
KW - Metallo-azide
KW - Structural resemblance
KW - d metal ions
UR - http://www.scopus.com/inward/record.url?scp=85041832014&partnerID=8YFLogxK
U2 - 10.1002/slct.201701944
DO - 10.1002/slct.201701944
M3 - Article
AN - SCOPUS:85041832014
SN - 2365-6549
VL - 2
SP - 11091
EP - 11099
JO - ChemistrySelect
JF - ChemistrySelect
IS - 34
ER -