Two copolymers of P1 and P2 comprising benzothiadiazole, 1,4-bis(dodecyloxy)-benzene units were synthesized by Sonogashira coupling polymerization based on ethynyl-linked 1,2,5,6-naphthalenediimide. Their thermal, optical, electrochemical as well as charge transport properties were studied. Bottom-gate top-contact organic field-effect transistors (OFETs) measurements of P1 and P2 thin films showed different charge transport behaviors. P1 displayed pure electron transport behaviors in OFETs with electron mobility up to 10−3 cm2·V−1·s−1, while P2 exhibited hole transport features. The molecular structure analysis revealed that the structure of P1 has the acceptor-linker-acceptor′ (A-L-A′) characteristic, and P2 possesses the donor-linker-acceptor (D-L-A) structure feature. The results demonstrate that different molecular structures lead them to have distinct charge transport behaviors. In particular, the first pure electron transport copolymer in OFETs based on 1,2,5,6-naphthalenediimide is achieved.

•One Co-based MOF prepared by O-donor bridging and N-donor chelating mixed-ligands•The MOF constructed by infinite sinusoidal-like rod-shaped Co–{Co3}-chains as SBUs•The MOF displays canted antiferromagnetic behavior.A novel Co-based metal–organic framework {[Co4(1,3-bdc)3(bta)2(CH3CH2OH)2]·CH3OH·H2O}n (1) (H2bdc = 1,3-benzenedicarboxylate, Hbta = benzotriazolate), has been synthesized and characterized by elemental analysis, IR and single-crystal X-ray diffraction analysis. Compound 1 represents a new structural topology constructed by infinite sinusoidal-like rod-shaped Co–{Co3}-chains as secondary building units. Moreover, the magnetic properties of 1 have been well investigated.A novel Co-based MOF has been synthesized and characterized by various state-of-the-art methods. The MOF represents a new structural topology constructed by infinite sinusoidal-like rod-shaped Co–{Co3}-chains as SBUs. Moreover, the MOF 1 displays canted antiferromagnetic behavior.

•A mixed-valent tetranuclear Mn complex with pyrazolate-bridge ligand was synthesized.•Complex 1 has a linear [Mn4N8O2] core with two dimanganese-di-N-N-bridging subunits.•Three contiguous rings exhibit a (4, 2, 4) oxo-manganese-nitrogen linear arrangement.•Complex 1 exhibits antiferromagnetic interactions between metal centers.A novel mixed-valent tetranuclear manganese complex, [MnII2MnIII2(dophe)2(DMSO)7(H2O)] (H5dophe = di-[5-(2-oxyphenyl)-pyrazole]-3-hydroxamic ether) was prepared and characterized through X-ray crystallography, elemental analysis and IR spectra. The molecule contains a linear [MnII2MnIII2N8O2] core with two dinuclear NN bridged subunits connected by two μ2-O atoms. Two dophe5 − ligands are located opposite to each other. Magnetic studies indicate the dominance of intramolecular antiferromagnetic interactions.Complex 1 consists of four linear arrangement Mn ion linked by two dophe5 − ligand locating opposite to each other to form a linear [MnII2MnIII2N8O2] core. Each ligand shows a μ4:η1:η1:η1:η1:η1:η1:η1:η1 coordination model, and they link four Mn ions to form two periphery six-membered chelating rings and five inner five-membered chelating rings and three paratactic rings with a (4, 2, 4) oxo-manganese–nitrogen linear arrangement.