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Most of transition metal(II) carboxylates were reported to exist as multinuclear complexes due to the multibinding modes of the ligands 1,2. For example, most of the copper(II) carboxylates were dinuclear with the paddle-wheel structure 3-7 , while other metal(II) complexes (Mn, Co, Ni and Zn) were found to form polymeric structures 8-11. Hence, these complexes are attracting the interests of many researchers in various fields, such as catalysis, molecular electronics and molecular magnetism. The main reason is because they are easily prepared from relatively low cost, nontoxic and readily accessible starting materials and readily characterized by conventional analytical methods. However, these complexes are yet to be commercially used as functional materials due to physical limitations, such as insolubility, high-melting and low-decomposition temperatures. Currently, our research group is focused on designing, synthesizing and characterizing thermally stable and low melting temperatures magnetic metal(II) carboxylates to function as molecular magnetic, photonic and electronic materials and as precursors for functional coordination polymers. This paper reports the synthesis, structural, magnetic, thermal, optical and redox properties of three complexes of 2-hexyldecanoato ligand (L) with Cu(II) (1), Ni(II) (2) and Co(II) (3). These complexes were obtained as room-temperature viscous liquids from the reaction of NaL with the

In this work, the effect of adding manganese oxide towards polyacrylonitrile-based activated carbon nanofibers (ACNFs) was evaluated. The properties of PAN-based ACNFs/MnO 2 were analyzed by using scanning electron microscopy (SEM), BrunauerEmmett-Teller (BET), and Fourier transform infrared (FTIR). The sorption study of the electrospun ACNFs/MnO 2 in comparison to neat ACNFs and commercial granular AC towards lead (Pb) was also conducted. SEM micrograph analysis displays more compact nanofibers with dispersion of beads that were observed in the ACNF/MnO 2 with the diameter of 437.2 nm while aligned nanofibers with the diameter of 575.5 nm were observed in the neat ACNFs. The FTIR analysis showed the peak of Mn-O, which indicates the presence of MnO 2 in the ACNFs/MnO 2. In comparison to the neat ACNFs, surface area of the prepared ACNFs/MnO 2 is lower. It was found out that the removal of Pb(II) using ACNFs and ACNFs/MnO 2 is higher than commercial granular activated carbon with a removal rate of 100% at initial concentration of 3.5 ppm. The promising results of ACNFs/MnO 2 contributed by their satisfactory specific surface area and vast presence of surface functional groups.