A novel linear polymer (PFABT) containing bithiazole rings was synthesized by polycondensation of 2,2′-diamino-4,4′-bithiazole (DABT) and formaldehyde. The complexes of PFABT with two transition metal ions (Fe²⁺, Cu²⁺) were prepared for the first time. The polymer was determined through FT-IR, ¹H-NMR and elemental analysis (EA), and the complexes were characterized by FT-IR. The magnetic behaviors of these complexes were measured as a function of magnetic field strength (0–50 kOe) at 4 K and as a function of temperature (4–300 K) under an applied magnetic field of 30 kOe. The results show that PFABT-Cu²⁺ is a ferromagnet while PFABT-Fe²⁺ is an anti-ferromagnet. Copyright © 2007 John Wiley & Sons, Ltd.

N-2-Thiazolylmethacrylamide (NTMA) was polymerized by a radical route to obtain the polymer in good yields. The complexes of PolyNTMA with three rare earth ions Nd(III), Pr(III), and Sm(III) were prepared for the first time. FTIR and ¹H NMR were applied to characterize these materials. The magnetic behavior of PolyNTMA–metal complexes was examined as a function of applied magnetic field at 4 K and as a function of temperature (4–300 K) at an applied magnetic field of 30 kOe. It was found that Pr(III) complex exhibits an antiferromagnetic property, while Nd(III) and Sm(III) complexes exhibit a special magnetic property different from the typical magnet. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 1289–1293, 2006

A novel polymer (poly[2,2'-(4,4'-bithiazolylene)][N-(2-ethylhexyl)-3,6-carbazylene] (PBTCA) was first synthesized from 2,2′-diamino-4,4′-bithiazole and N-(2-ethylhexyl)-3,6-diformylcarbazole. The structure of the polymer was determined with IR and ¹H-NMR spectroscopy. The PBTCA–Nd³⁺ complex was prepared via the mixing of neodymium trichloride hexahydrate and PBTCA in dimethyl sulfoxide under a nitrogen atmosphere. The magnetic behaviors of the Nd³⁺ complex of a poly(Schiff base) were measured as a function of the magnetic field strength (0–50 kOe) at 4 K and as a function of the temperature (4–300 K). The results show that PBTCA–Nd³⁺ is a ferromagnet when the temperature is below 15 K, and above that, it is a diamagnet. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 443–446, 2006

N-2-thiazolyl(meth)acrylamides were polymerized by a radical route to obtain polymers in good yields. The polymers, with a pendent heterocyclic group, are soluble in common organic solvents, which allow the corresponding metal complexes with higher loads to be prepared easily. FTIR, ¹H NMR, and energy-dispersive X-Ray spectroscopy (EDX) were applied to characterize these materials. The magnetic behavior of poly(N-2-thiazolyl(meth)acrylamide)-Fe(II) complexes was examined as a function of applied magnetic field at 4 K and as a function of temperature (4 ∼ 300 K) at an applied magnetic field of 1 ∼ 3 kOe, exhibiting the characteristics of a ferromagnet. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 83–87, 2005

The polymerization of N-phenylmaleimide was carried out with the binary rare-earth coordination catalyst lanthanum phosphonate [La(P₅₀₇)]–trisobutyl aluminum [Al(i-Bu)₃] in toluene at 60°C. The dependence of the polymerization on the polymerization time, the molar ratio of Al(i-Bu)₃ to La(P₅₀₇), and the concentration of the catalyst were studied. The structures of the resultant polymer were characterized with ¹H-NMR, ¹³C-NMR, and Fourier transform infrared spectrophotometry, and the thermal properties of the polymer were measured with thermogravimetric analysis. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 96: 979–982, 2005

A novel polymer resulting from the polycondensation of 2,2′-diamino-4,4′-bithiazole (DABT) with 5,5′-methylene-bis-salicylaldehyde (MBSA) and its ferric complex are described. Analyses of Fourier transform infrared (FT-IR) and X-ray photoelectron spectroscopy (XPS) revealed that both bithiazole residue and Schiff-base moiety acted as coordination sites for Fe³⁺ ions in the polymeric matrix. The magnetic behavior of the complex was studied as a function of magnetic field strength (0–60 kOe) at 25 K and as a function of temperature (5–300 K) at a magnetic field strength of 30 kOe. The hysteretic loop was measured at 5 K for the complex showing coercivity (H_c) of 20 Oe and remnant magnetization (M_r) of 0.002 emu/g, which is much lower than those of bithiazole-based polymeric complexes previously reported. The results indicated that the present complex is of the typical characteristics of a soft ferromagnet. Copyright © 2005 John Wiley & Sons, Ltd.

A new kind of π-conjugated heterocyclic poly(Schiff base) was firstly prepared by the condensation reaction between tetrathiatetrahydropentalene-type diketone and bithiazole-diamine in good yields. The polymers were characterized by VPO, FTIR and ¹H NMR spectroscopy. A large bathochromic shift was observed in UV-Vis spectra for these polymers due to the π-π* transition in the conjugated main chain. Brief examination indicated that the nitrogen- and sulfur-containing polymers exhibited an excellent chelating tendency to metal ions and the corresponding polymeric complexes would be expected to have potential in applications.

Two novel bithiazole-containing polyamides, DClAI and DTTPA, and their complexes were synthesized by condensation and complexation. Novel homogeneous composite films were prepared by in situ blending these complexes with polyvinyl alcohol. These polymeric complexes and composite films were characterized by FTIR. The magnetic properties of the complex and its related composite film were measured using a physical property measurement system. It was found that the properties of films are similar to those of their related polymeric complexes. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 1264–1270, 2004