Errui Yang

Enhancing CO2 adsorption enthalpy and selectivity via amino functionalization of a tetrahedral framework material

The cooperative assembly of mixed 2-aminoisonicotinate and adeninate ligands with Zn2+ centers generates a porous tetrahedral framework material with rich amino groups in the pores, which shows high CO2 uptake at 0.1 bar, high enthalpy of CO2 adsorption (40 kJ mol−1) and excellent adsorption selectivity of CO2 over N2 under ambient conditions.

Zeolitic Metal–Organic Frameworks Based on Amino Acid

Two enantiomorphic metal-organic frameworks with zeotype SOD topology have been successfully synthesized from enantiopure L-alanine and D-alanine, respectively, which demonstrates the feasibility of fabricating MOFs that integrate the 4-connected zeotype topologies and homochiral nature by the employment of enantiopure amino acids.

Two photoluminescent metal–organic frameworks with highly-connected topological nets

Presented here are two three-dimensional metal–organic frameworks [H2N(CH3)2]2[Cd5(bdt)3(btc)2(H2O)2]·3(H2O) (1) (H2bdt = 1,4-benzeneditetrazol-5-yl; H3btc = 1,3,5-benzenetricarboxylic acid) and [Cd5(Hbdt)2(bdt)(btc)2(H2O)2]·4H2O (2) with integrated topological nets, where the trinuclear cadmium units act as 10-connected nodes. Since both compounds are built from a dual-ligand assembly approach, the topological analyses on the networks of compounds 1 and 2 are also considered as the integration of two nets. For compound 1, its net is integrating an xbe net of Cd–bdt connectivity and kgd net of Cd–btc connectivity, while the net of compound 2 is integrating a fry net of Cd–bdt connectivity and kgd net of Cd–btc connectivity. Furthermore, the luminescence properties of the two compounds are investigated in the solid state at room temperature.

A luminescent neutral cadmium(II)–boron(III)–imidazolate framework with sql net

One neutral boron–imidazolate-framework (BIF-35) based on the assembly of tetradentate B(im)4− ligands and (CdBr)+ units has been prepared, and it features a two-dimensional sql net. This work illustrates the feasibility of employing a wider variety of metal ions to fabricate new neutral BIFs.

Enhancement of thermal stability in bismuth phosphate by Ln3+ doping for tailored luminescence properties

Bismuth phosphate represents one promising class of luminescent host materials, while its application is challenged by structural instability. In this work, a series of nanocrystals Bi1−xLnxPO4 (x = 0.02–0.09; Ln = La, Ce, Nd, Eu, Er) were prepared with an aim to find new routes in improving the structural stability of BiPO4 nanocrystals. Systematic sample characterization by XRD, SEM, TEM, and EDX indicates that doping a small amount of Ln3+ ions ≤9% could significantly stabilize the low temperature monoclinic phase (LTMP) by retarding the structure transition to the high temperature monoclinic phase (HTMP). For instance, after annealing at 900 °C, the relative contents of LTMP for co-doping of 5% La3+, 5% Nd3+, 5% Ce3+ with 2% Eu3+ were as high as 89%, 87%, and 96%, respectively, which are totally different from the un-doped BiPO4 at this temperature where LTMP is absent completely. This phenomenon has never been reported before for improving the stability of BiPO4, which has been explained in terms of lattice disorder due to the preference of the linking ways of rare earth–oxygen polyhedra and PO4 tetrahedra. With this abnormal structural stabilization, the luminescent properties of the Ln3+ doped LTMP, including emission intensity, lifetime, and quantum efficiency, were further tailored through simply tuning the calcination temperatures.