Structural and Magnetic Properties of One-Dimensional Squarate Bridged Coordination Polymers Containing 2-Aminomethylpyridine Ligand

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Atıf İçin Kopyala

Bulut A., Ucar I., Kalyoncu T., Yerli Y., Buyukgungor O.

JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS, cilt.20, sa.4, ss.793-801, 2010 (SCI-Expanded)

• Yayın Türü: Makale / Tam Makale
• Cilt numarası: 20 Sayı: 4
• Basım Tarihi: 2010
• Doi Numarası: 10.1007/s10904-010-9406-1
• Dergi Adı: JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
• Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
• Sayfa Sayıları: ss.793-801
• Yıldız Teknik Üniversitesi Adresli: Hayır

Özet

Three novel one-dimensional (1D) coordination polymers with general formula {[M(mu-sq)(2)(amp)(2)]center dot H(2)O}(n) [M=Cu(II) (1), Zn(II) (2)] and [Cd(mu-sq)(2)(amp)(2)](n) (3) [sq: Squarate; amp:2-aminomethylpyridine] have been prepared and spectroscopically studied. Each metal (II) ion in 1-3 is octahedrally coordinated by two sq and two amp ligands. The amp ligands are N,N' coordinated, while the sq ligands bridge the metal centers forming 1D linear chain structure. The individual chains are linked by O-H center dot center dot center dot O hydrogen bonds involving the hydrogens of water molecules (1-2), amino hydrogens and squarate O atoms (1-3). The hydrogen bonded layers are further assembled into three-dimensional supramolecular networks by weak aromatic pi-pi interactions. EPR results indicate that the ground state of the paramagnetic electron in 1 and Cu(2+) doped complexes 2-3 is d(x)2 (-y)2. Magnetic measurements reveal that complex 1 shows paramagnetic behavior.