Yunfeng Zhao

Porous lanthanide–copper coordination frameworks exhibiting reversible single-crystal-to-single-crystal transformation based on variable coordination number and geometry

Two serial heterometallic Ln–Cu coordination polymers [Ln2Cu(NIPH)4(H2O)4]·6H2O (Ln = Gd (1a), Nd (2a), Sm (3a), Eu (4a), Tb (5a), Dy (6a), Ho (7a) and Er (8a)) and [Ln2Cu(NIPH)4(H2O)2] (Ln = Gd (1b), Nd (2b), Sm (3b), Eu (4b), Tb(5b), Dy (6b), Ho (7b) and Er (8b) (NIPH = 5-nitroisophthalate) have been successfully synthesized and exhibit reversible single-crystal-to-single-crystal transformation behavior based on a dehydration and rehydration process involving coordinated and uncoordinated water molecules. The coordination polymers 1a–8a and 1b–8b belong to two sets of isomorphous coordination frameworks respectively; their 3D frameworks are constructed by different heterometallic polynuclear chains. For the serial crystals 1a–8a, the Ln3+ and Cu2+ ions are 8-coordinate and 4-coordinate respectively. While for the other serial crystals, 1b–8b, the Ln3+ and Cu2+ ions are 9-coordinate and 6-coordinate respectively. La3+, Ce3+ and Pr3+ were also employed to construct Ln–Cu coordination frameworks [LaCu(NIPH)2(HNIPH)(H2O)2]·2H2O (La-1), [La2Cu(NIPH)4(H2O)2] (La-2), [Ce2Cu(NIPH)4(H2O)6] (Ce-1) and [Pr2Cu(NIPH)4(H2O)4]·6H2O (Pr-a), which do not display the crystal-to-crystal transformation characteristic.

Solution-Processed Microwires of Phthalocyanine Copper(II) Derivative with Excellent Conductivity

Well-defined 1D microwires of CuPcOC4 with diameters of about 1.0 microm and lengths ranging from 260 to 300 microm as well as ultralong microwires (>5 mm) with diameters of about 10 microm and high length/diameter aspect ratios were synthesized via a simple solution process. Electrical conductive devices based on these microwires fabricated in situ on glass substrates with two ITO electrodes exhibited excellent conductivity properties.