Cui Yutao    Yan Jie    Sun Yue    Ye Zou    Yimeng Sun    Wei Xu    朱道本    

Science Bulletin

2018

Two novel 3D pure inorganic compounds based on [CrDy(μ-O)(μ-OH)] cluster units and sulfate anions are presented. Both complexes exhibit single-molecule-magnet (SMM)-like behavior. Permutation of the magnetic moment direction among SMM-like cluster units has a significant effect on the performance of molecular nanomagnets, and directional consistency shows obvious advantages.

Caiming Liu    Deqing Zhang    Xiang Hao    朱道本    

Inorganic Chemistry

2018

New conducting polymers polythieno[3,4-b]thiophene-Tosylate (PTbT-Tos) are prepared by solution casting polymerization. Through tuning the alkyl group of TbT, the electrical conductivity can be effectively enhanced from 0.0001 to 450 S cm. Interestingly, the electrical conductivity of PTbT-C1-Tos increases significantly from 450 S cm at room temperature to 4444 S cm at 370 K, which is disparate from polyethylenedioxythiophene-Tos exhibiting metallic conducting behavior. Quasi-reversible phase transformation with temperature from 3D crystallites to lamellar-stacking coincides with the increasing electrical conductivity of PTbT-C1-Tos with heating. Methyl-substituted PTbT-Tos with the best electrical property is further utilized for thermoelectrics and a power factor as high as 263 µW m K is obtained. It is believed that PTbT-Tos will be a promising family of conducting polymers for solution-processed organic electronics.

Yuan Dafei    Liu Liyao    Jiao Xuechen    Zou Ye    McNeill Christopher R.    Wei Xu    Xiaozhang Zhu    朱道本    

Advanced Science

2018

Side chains of photovoltaic materials play an important role in determining charge transport property, film morphology, and the corresponding device performance. In this work, two new acceptor materials, ATT-6 and ATT-7 with different side chains, m-hexylphenyl and m-hexyloxyphenyl on the indacenodithiophene, are designed and synthesized for applications in non-fullerene polymer solar cells. ATT-7 shows a higher absorption coefficient, increased crystallinity, and improved electron mobility in comparison with ATT-6. Using wide-bandgap polymer poly[(2,6-(4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)-benzo[1,2-b:4,5-b′]dithiophene))-alt-(5,5-(1′,3′-di-2-thienyl-5′,7′-bis(2-ethylhexyl)benzo[1′,2′-c:4′,5′-c′]dithiophene-4,8-dione)] (PBDB-T) as donor, optimized devices based on PBDB-T:ATT-7 and PBDB-T:ATT-6 delivers power conversion efficiencies of 10.30% and 8.39%, respectively. The higher performance of ATT-7-based device can be attributed to efficient exciton dissociation, reduced bimolecular recombination, and enhanced and balanced charge carrier mobilities. These results indicate that side-chain modification is an easy but efficient way in the design of high-performance non-fullerene acceptors.

Zhang Jianyun    刘烽    Shanshan Chen    Changduk Yang    Xiaozhang Zhu    朱道本    

Macromolecular Rapid Communications

2018

Two 1D coordination polymers composed of DyZn(salen) units and pyridin-N-oxide-4-carboxylate have been prepared by solvothermal reactions. Complex 1 with the formula {[DyZn(L)(POC)](OH)(ClO)}·HO·MeOH [HL] = N,N′-bis(3-methoxysalicylidene)-1,3-diaminopropane, POC = pyridin-N-oxide-4-carboxylate] is composed of a zigzag chain cation [DyZn(L)(POC)] as well as isolated hydroxide and perchlorate anions. Complex 2 with the formula {[DyZn(L)(POC)](OH)(ClO)}·9HO [HL] = N,N′-bis(3-methoxysalicylidene)-1,2-diaminoethane] is also an ionic compound containing isolated hydroxide and perchlorate anions, but its cation shows a novel nanowire structure, in which six-coordinate zinc(II) ions with C symmetry act as the axis and [DyZn(L)(POC)] structural units as spiral leaves. Complex 1 shows good single-molecule magnet performance with an U/k value of 235.3(3.1) K (H = 0 Oe), one of the largest values for coordination polymers. A butterfly-shaped magnetic hysteresis loop can be monitored at as high as 3.8 K for 1, while a dc field is necessary for complex 2 to display slow magnet relaxation owing to the quantum-tunneling effect, with a much smaller U/k value of 14.6(0.2) K (H = 1000 Oe). The difference of magnetic properties has been explained using detailed ab initio calculations.

Caiming Liu    Deqing Zhang    Su Jing Bu    Zhang Yi-Quan    朱道本    

Inorganic Chemistry

2018

Two 1D coordination polymers composed of DyZn(salen) units and pyridin-N-oxide-4-carboxylate have been prepared by solvothermal reactions. Complex 1 with the formula {[DyZn(L)(POC)](OH)(ClO)}·HO·MeOH [HL] = N,N′-bis(3-methoxysalicylidene)-1,3-diaminopropane, POC = pyridin-N-oxide-4-carboxylate] is composed of a zigzag chain cation [DyZn(L)(POC)] as well as isolated hydroxide and perchlorate anions. Complex 2 with the formula {[DyZn(L)(POC)](OH)(ClO)}·9HO [HL] = N,N′-bis(3-methoxysalicylidene)-1,2-diaminoethane] is also an ionic compound containing isolated hydroxide and perchlorate anions, but its cation shows a novel nanowire structure, in which six-coordinate zinc(II) ions with C symmetry act as the axis and [DyZn(L)(POC)] structural units as spiral leaves. Complex 1 shows good single-molecule magnet performance with an U/k value of 235.3(3.1) K (H = 0 Oe), one of the largest values for coordination polymers. A butterfly-shaped magnetic hysteresis loop can be monitored at as high as 3.8 K for 1, while a dc field is necessary for complex 2 to display slow magnet relaxation owing to the quantum-tunneling effect, with a much smaller U/k value of 14.6(0.2) K (H = 1000 Oe). The difference of magnetic properties has been explained using detailed ab initio calculations.

Caiming Liu    Deqing Zhang    Su Jing Bu    Zhang Yi-Quan    朱道本    

Inorganic Chemistry

2018

Both second-order nonlinear optical and single-molecule magnet properties are observed in a novel 1D homochiral Zn-Dy heterometallic left-handed helical chain complex (1) without chiral ligands, which evolves from a ZnDy pentanuclear cluster complex (2), thanks to the structural guiding role of perchlorate anions.

Caiming Liu    Deqing Zhang    Xiong Ren Gen    Xiang Hao    朱道本    

Chemical Communications

2018

This month's cover picture results from Professor Bin Zhang's collaborative work between Chinese Academy of Sciences and Peking University (China). Since the discovery of high-temperature superconductors for hole doping on parent antiferromagnetic compound LaCuO, the antiferromagnetic molecular crystal with a (4,4) grid copper-formate framework Cu(HCOO)(HO) and its deuterated compound (Cu(DCOO)(DO)) have been studied extensively for supposed dual-functional molecular crystals. The cover picture shows the ideal situation by replacing intercalated HO with an organic donor. The organic–inorganic hybrid (BEDT-TTF)Cu(HCOO) is obtained through the electrochemical oxidation of neutral BEDT-TTF in the presence of an ammonium salt of the 1D copper-formate framework [(CH)NH]Cu(HCOO) in a CHCl-CHOH solution. For more details, read the full text of the Communication at 10.1002/open.201700041.

Zhang Bin    Zhang Yan    Zheming Wang    Zengqiang Gao    Yang Deliang    Wang Dongwei    Yanjun Guo    朱道本    

ChemistryOpen

2017

The regioselective transformation of heterobuckybowl trichalcogenasumanenes 1 a,b at peripheral butoxy groups afforded trichalcogenasumanene ortho-quinones 2 a,b. Compounds 2 a,b are distinct from 1 a,b in terms of their molecular geometry and electronic state; that is, they have a shallower bowl depth and show absorbance in the NIR region. The reaction of 2 a,b with diamines resulted in a variety of heteropolycycles, including molecular spoon 3 a–6 a, planar π-systems 3 b–6 b, and highly twisted [7-6-6]-fused systems 7 a,b. These new heteropolycycles had different optical/electrical properties: 4 a,b showed hole mobility of approximately 0.002 cm V s, 6 a displayed red emission in both solution and the solid state, and 7 a,b formed tight stacks of the curved π-surface.

Sun Yantao    Li Xuexiang    Sun Chun-Lin    Shen Hongguang    Hou Xueqing    Lin Dongxu    Zhang Hao Li    Chongan Di    朱道本     Shao Xiangfeng   

Angewandte Chemie - International Edition

2017

By printing polydimethylsiloxane (PDMS) on a polyethylene terephthalate (PET) substrate as a mask, an insoluble and infusible metal coordination polymer, poly[K(Ni-ethylenetetrathiolate)] (poly[K(Ni-ett)]), film was patterned via an electrochemical deposition process. The method is verified to be capable of fabricating 108 n-type legs in one batch. A thermoelectric generator consisting of eighteen legs connected in series in one row had an output power of 0.468 μW under a temperature difference of 12 K with the best power density reaching up to 577.8 μW cm.

Liu Liyao    Sun Yuanhui    Li Wenbo    Zhang Jiajia    Huang Xing    Chen Zhijun    Yimeng Sun    Chongan Di    Wei Xu    朱道本    

Materials Chemistry Frontiers

2017