Tian Wen

Two-Dimensional Copper(I) Coordination Polymer Materials as Photocatalysts for the Degradation of Organic Dyes

Two isomeric two-dimensional copper(I) coordination polymer materials based on an in situ generated 5-(3-pyridyl)tetrazole ligand show similar layer structures but distinct photoluminescent and photocatalytic properties, which present an interesting comparative study on the structure-property correlation between isomeric materials.

Two luminescent Cu(I) coordination polymers based on the 1-(4-tetrazolephenyl)imidazole ligand for sensing of nitrobenzene

Two Cu(I) coordination polymers based on the in situ generated 1-(4-tetrazolephenyl)imidazole ligand show intriguing ABW and (4,8)-connected topologies, and both of them are promising luminescent materials for sensing of nitrobenzene.

Synthesis of Halide-Modulated Cuprous(I) Coordination Polymers with Mechanochromic and Photocatalytic Properties

Two copper(I) halide-based coordination polymers, namely, [Cu3Cl2(Tipa)2]Cl (1, (Tipa = tris(4-(1H-imidazol-1-yl)phenyl)amine) and [Cu3I3(CuI)2(Tipa)3] (2), were obatined under the solvothermal reactions, respectively. Compound 1 with the chain structure shows unique Cu···Cu interactions, C-H···Cl halogen hydrogen bonds, and π···π stacking interactions. It also exhibits unusual mechanochromic and photocatalytic properties on degradation of methylene blue (MB).

Structure-dependent mechanochromism of two Ag(I) imidazolate chains

Two Ag(I)-imidazolate compounds with distinct chain-like structures, namely, [Ag(dm-bim)]n (1, dm-bim = 5,6-dimethylbenzimidazole) and [Ag(m-bim)]n (2, m-bim = 2-methylbenzimidazole), were synthesized and structurally characterized, respectively. Compound 1 with helical chains exhibited unique luminescence mechanochromism due to short Ag⋯Ag interactions (2.986 A).

A Rational Strategy To Construct a Neutral Boron Imidazolate Framework with Encapsulated Small-Size Au-Pd Nanoparticles for Catalysis.

A series of 3D neutral boron imidazolate frameworks (BIFs) with octahedral metal centers were synthesized based on the charge-balancing principle. Au-Pd nanoparticles (NPs) with a mean size of 2.12 nm were then successfully obtained and encapsulated in these BIF structures through the simultaneous reduction of Au(3+)/Pd(3+) ions by B-H bonds of tridentate boron ligands. The very small sizes of these Au-Pd NPs are attributed to the pore confinement effect of BIFs. This work not only brings new methodology for the construction of neutral BIFs but also suggests a new strategy for loading smaller-sized bimetallic NPs into BIFs.

Encapsulation of an Interpenetrated Diamondoid Inorganic Building Block in a Metal–Organic Framework

The first example of an inorganic-organic composite framework with an interpenetrated diamondoid inorganic building block, featuring unique {InNa}n helices and {In12 Na16 } nano-rings, has been constructed and structurally characterized. This framework also represents a unique example of encapsulation of an interpenetrated diamondoid inorganic building block in a metal-organic framework.

Mechanochromic Cu(I) boron imidazolate frameworks with low-dimensional structures and reducing function

Two low-dimensional Cu(I) boron imidazolate frameworks (BIFs), [CuBH(bim)3]n (BIF-40; bim = benzimidazolate) and [CuBH(im)3]n (BIF-6, im = imidazolate), have been synthesized and both of them display unique mechanochromism. In addition, BIF-40 showed reducing activity due to the rich B–H bonds in the structure, and it was employed to load AuPd bimetal nanoparticles through a one-step process for further catalysis. The corresponding mechanism involving a grinding process between chains or layers is discussed in detail. This work not only provides compelling evidence for designing and applying coordination polymers as mechanochromic materials, but also develops an eco-friendly strategy for loading bimetallic NPs into BIFs.

Digital controlled luminescent emission via patterned deposition of lanthanide coordination compounds.

Presented here is a new direct patterning method, printer-type lithography technology, for the formation of lanthanide coordination compounds (LCCs) single crystal in different spatial locations. We first integrate this technology in digital controlled emission by patterned deposition of LCCs. We demonstrate its usefulness in the control of emission intensity by regulating print cycles, so that the emission intensity can be digitally controlled. This printer technology can also be used to precisely control the location at which a single LCC crystal is grown, which provides great promise in the application of anticounterfeiting barcode. Besides, by varying the stoichiometric ratio of the lanthanide ions in the identical cartridge, a fluent change of emission colors from white, orange, pink, to blue green was achieved. Therefore, this low-cost and high-throughput patterning technique can be readily applied to a wide range of areas including micro-/nanofabrication, optics, and electronics studies.