TY  - JOUR
A1  - Zhang, Su-Yun
A1  - Guo, Wen-Bin
A1  - Tang, Ying-Ying
A1  - Xu, Jin-Qiu
A1  - He, Zhang-Zhen
T1  - Observation of Spin Relaxation in a Vanadate Chloride with Quasi-One-Dimensional Linear Chain
JF  - Crystal growth & design : integrating the fields of crystal engineering and crystal growth for the synthesis and applications of new materials
N2  - A new cobalt(II) vanadate chloride, Pb2Co(OH)(V2O7)Cl, has been synthesized under mild hydrothermal conditions. It contains quasi-one-dimensional (1D) linear chains built by edge-sharing of (CoO6)-O-II octahedra. The cobalt(II) oxide chains are further interconnected by (V2O7)(4-) dimers into a three-dimensional (3D) anionic framework with Pb2+ and Cl- ions residing in Co4V8 12-member ring tunnels. The intrachain Co center dot center dot center dot Co distance is 3.041 angstrom, while the interchain distances are 8.742 and 9.256 angstrom. Magnetic measurements suggest the ferromagnetic intrachain and the antiferromagnetic interchain interactions with a specific value of J(intra)/J(inter) = 1.7 x 10(3). Zero-field heat capacity demonstrates the magnetic long-range ordering at 5.5 K. Alternating current (AC) magnetic susceptibility under zero external direct current (DC) fields displays two slow magnetic relaxations at low temperatures, giving characteristic relaxations (tau(0)) of 1.2(3) x 10(-12) and 1.9(4) x 10(-10) s with effective energy barriers (Delta(r)) of 76.1(2) and 48.4(5) K. The energy barrier between the spin up and spin-down states can be ascribed to the ferromagnetic spin chain and the Ising-like magnetic anisotropy in Pb2Co(OH)(V2O7)Cl.
Y1  - 2019
U6  - https://doi.org/10.1021/acs.cgd.8b01839
SN  - 1528-7483
SN  - 1528-7505
VL  - 19
IS  - 4
SP  - 2228
EP  - 2234
PB  - American Chemical Society
CY  - Washington
ER  - 
TY  - JOUR
A1  - Zhang, Su-Yun
A1  - Kochovski, Zdravko
A1  - Lee, Hui-Chun
A1  - Lu, Yan
A1  - Zhang, Hemin
A1  - Zhang, Jie
A1  - Sun, Jian-Ke
A1  - Yuan, Jiayin
T1  - Ionic organic cage-encapsulating phase-transferable metal clusters
JF  - Chemical science
N2  - Exploration of metal clusters (MCs) adaptive to both aqueous and oil phases without disturbing their size is promising for a broad scope of applications. The state-of-the-art approach via ligand-binding may perturb MCs' size due to varied metal–ligand binding strength when shuttling between solvents of different polarity. Herein, we applied physical confinement of a series of small noble MCs (<1 nm) inside ionic organic cages (I-Cages), which by means of anion exchange enables reversible transfer of MCs between aqueous and hydrophobic solutions without varying their ultrasmall size. Moreover, the MCs@I-Cage hybrid serves as a recyclable, reaction-switchable catalyst featuring high activity in liquid-phase NH3BH3 (AB) hydrolysis reaction with a turnover frequency (TOF) of 115 min−1.
Y1  - 2019
U6  - https://doi.org/10.1039/c8sc04375b
SN  - 2041-6520
SN  - 2041-6539
VL  - 10
IS  - 5
SP  - 1450
EP  - 1456
PB  - Royal Society of Chemistry
CY  - Cambridge
ER  -