Supramolecular complexes of Co II Ni II and Zn II p hydroxybenzoates with caffeine Synthesis spectral characterization and crystal structure
     
Yazarlar (6)
Erdal Taşdemir Kafkas Üniversitesi, Türkiye
Doç. Dr. Füreya Elif ÖZTÜRKKAN Kafkas Üniversitesi, Türkiye
Doç. Dr. Mustafa SERTÇELİK Kafkas Üniversitesi, Türkiye
Tuncer Hökelek Hacettepe Üniversitesi, Türkiye
Raziye Çatak Çelik Aksaray Üniversitesi, Türkiye
Prof. Dr. Hacali NECEFOĞLU Kafkas Üniversitesi, Türkiye
Makale Türü Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
Dergi Adı Journal of Molecular Structure (Q4)
Dergi ISSN 0022-2860 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler SCI
Makale Dili İngilizce Basım Tarihi 09-2016
Cilt / Sayı / Sayfa 1119 / 1 / 472–478 DOI 10.1016/j.molstruc.2016.05.006
Makale Linki http://linkinghub.elsevier.com/retrieve/pii/S0022286016304410
Özet
Three novel complexes Co(II), Ni(II) and Zn(II) containing p-hydroxybenzoates and caffeine ligands were synthesized and characterized by elemental analysis, FT-IR and UV-vis Spectroscopy, molar conductivity and single crystal X-ray diffraction methods. The thermal properties of the synthesized complexes were investigated by TGA/DTA. The general formula of the complexes is [M(HOC6H4COO)2(H2O)4]·2(C8H10N4O2)·8H2O (where: M: Co, Ni and Zn). The IR studies showed that carboxylate groups of p-hydroxybenzoate ligands have monodentate coordination mode. The M2+ ions are octahedrally coordinated by two p-hydroxybenzoate ligands, four water molecules leading to an overall MO6 coordination environment. The medium-strength hydrogen bondings involving the uncoordinated caffeine ligands and water molecules, coordinated and uncoordinated water molecules and p-hydroxybenzoate ligands lead to three-dimensional supramolecular networks in the crystal structures.
Anahtar Kelimeler
Metal complex | p-hydroxybenzoic acid | Caffeine | X-ray diffraction | Supramolecular framework