Four- and five-coordinate metal atoms in a supramolecular polymeric assembly of silver(I) with (4-methyl-2-quinolylthio)acetate

• Published in: Russian journal of inorganic chemistry Vol. 61; no. 11; pp. 1397 - 1402
• Main Authors: Kokunov, Yu. V., Gorbunova, Yu. E., Kovalev, V. V., Popov, L. D., Borodkin, S. A., Razgonyaeva, G. A., Kozyukhin, S. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-11-2016; Springer Nature B.V
• Subjects: Atomic structure; Chemistry; Chemistry and Materials Science; Coordination Compounds; Crystal structure; Inorganic Chemistry; Ligands; Molecular structure; Silver; Supramolecular frameworks; Synthesis (chemistry); Water chemistry
• ISSN: 0036-0236; 1531-8613
• DOI: 10.1134/S0036023616110097

The coordination compound [Ag
2
L
2
(H
2
O)
2
] ·
2
H
2
O (I), L = C
12
H
10
NO
2
S has been synthesized by the reaction of AgNO
3
with 4-methyl-2-quinolylthioacetic acid (HL) preliminarily neutralized with an equimolar amount of NBu
4
OH. Its crystal structure has been determined, and luminescence properties have been studied. Crystals of I are monoclinic, space group C2/
c
,
a
= 31.239(6) Å,
b
= 12.056(2) Å,
c
= 16.846(3) Å, β = 122.17(3)°, V = 5370.4(2) Å
3
, ρ
calc
= 1.861 g/cm
3
,
Z
= 16. The structure is formed by two crystallographically nonequivalent silver atoms Ag(1) and Ag(2) and two tridentate bridging ligands L coordinated through the S, N, and O atoms. These atoms, together with water molecules, form the coordination environments of the metal atoms with CN = 5 and 4, respectively. The Ag
+
ions and the tridentate ligands form infinite [Ag
4
L
4
]
n
bands extended in the [001] direction. The presence of outer-sphere water molecules involved in O–H···O hydrogen bonding is responsible for the formation of a supramolecular framework structure. The photoluminescence spectrum of compound I shows two bands at ~450 and ~485 nm corresponding to the blue spectral range.