TY - JOUR

T1 - Terephthalate and IsonicotinateN-Oxide Complexes of the {Mo6I8}4+ Cluster

AU - Mikhaylov, M. A.

AU - Sukhikh, T. S.

AU - Sheven’, D. G.

AU - Sadykov, E. Kh

AU - Sokolov, M. N.

AU - Berezin, A. S.

AU - Tagil’tsev, K. A.

N1 - This work was supported by the Russian Science Foundation (grant no. 24-23-00397). Terephthalate and IsonicotinateN-Oxide Complexes of the {Mo6I8}4+ Cluster / M. A. Mikhaylov, T. S. Sukhikh, D. G. Sheven' [et al.] // Russian Journal of Coordination Chemistry. – 2025. – Vol. 51, No. 6. – P. 447-454. – DOI 10.1134/S1070328425600949.

PY - 2025/9/19

Y1 - 2025/9/19

N2 - Abstract: New complexes, (TBA)2[Mo6I8(OOC–C6H4–COOH)6] (I) and (TBA)2[Mo6I8(OOC–C5H4NO)6] (II), were synthesized by the reaction of (TBA)2[Mo6I8(OAc)6] with terephthalic acid and isonicotinic N-oxide acid, respectively. The optimized synthesis of complex II involves microwave activation of the reaction mixture at 130°C in a Teflon reactor using an ETHOS UP Milestone microwave system. According to X-ray structural analysis, the molybdenum atoms in the cluster cores of I and II are coordinated by carboxylate ligands in a monodentate fashion. The cluster anions [Mo6I8(OOC–C6H4–COOH)6]2– of complex I are arranged into a three-dimensional framework, and the crystal structure contains solvate molecules. Complexes I and II were characterized by elemental analysis for C, H, and N, IR spectroscopy, electrospray mass spectrometry, and proton nuclear magnetic resonance. The powder samples of I and II exhibit intense phosphorescence with emission maxima at ~680 nm, φ = 15%, τ = 125 µs (I) and φ = 12%, τ = 137 µs (II) (under air at λexc = 440 nm).

AB - Abstract: New complexes, (TBA)2[Mo6I8(OOC–C6H4–COOH)6] (I) and (TBA)2[Mo6I8(OOC–C5H4NO)6] (II), were synthesized by the reaction of (TBA)2[Mo6I8(OAc)6] with terephthalic acid and isonicotinic N-oxide acid, respectively. The optimized synthesis of complex II involves microwave activation of the reaction mixture at 130°C in a Teflon reactor using an ETHOS UP Milestone microwave system. According to X-ray structural analysis, the molybdenum atoms in the cluster cores of I and II are coordinated by carboxylate ligands in a monodentate fashion. The cluster anions [Mo6I8(OOC–C6H4–COOH)6]2– of complex I are arranged into a three-dimensional framework, and the crystal structure contains solvate molecules. Complexes I and II were characterized by elemental analysis for C, H, and N, IR spectroscopy, electrospray mass spectrometry, and proton nuclear magnetic resonance. The powder samples of I and II exhibit intense phosphorescence with emission maxima at ~680 nm, φ = 15%, τ = 125 µs (I) and φ = 12%, τ = 137 µs (II) (under air at λexc = 440 nm).

KW - X-ray structural analysis

KW - carboxylate complexes

KW - clusters

KW - microwave activation

KW - molybdenum(II) iodide

KW - nuclear magnetic resonance

UR - https://www.mendeley.com/catalogue/f704ccf4-5a09-39eb-b053-367262ae1ac4/

UR - https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=105016739365&origin=inward

UR - https://elibrary.ru/item.asp?id=82907860

U2 - 10.1134/S1070328425600949

DO - 10.1134/S1070328425600949

M3 - Article

VL - 51

SP - 447

EP - 454

JO - Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya

JF - Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya

SN - 1070-3284

IS - 6

ER -