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Four novel all-in-one structured cuprous iodide hybrid materials are presented. Isomerization of the alkyl chain on the ligand improved material thermal stability and regulated their luminescence to warm and near-white light emission, with the internal quantum yield increasing from 5% to 83%. This provides a reasonable route for designing white light emitting cuprous iodide materials for solid-state lighting in future. [ABSTRACT FROM AUTHOR]

As a luminescent material with excellent structural diversity and optical tunability, cuprous iodide organic–inorganic hybrid semiconductors have attracted extensive attention in the field of environmental friendly solid-state lighting (SSL). In order to systematically study how tiny changes in ligands influence the luminescence properties of their complexes, in this study, the tail atoms of ethyl groups in ligands are modified with halogen atoms (F, Cl, and Br) and four all-in-one (AIO)-structured cuprous iodide inorganic–organic hybrid semiconductor materials (Cu2I4(Ln)2) are successfully obtained. The adjustment of the tail atoms effectively regulated the stacking modes of Cu2I42− clusters and their luminescence properties, realizing the transition of the crystal luminescence color from blue to green with the internal quantum yield (IQY) increasing from 1.57% to 53.39%. Their optical diffuse reflectance spectra and density functional theory calculations (DFT) helped investigate the origin and mechanism of luminescence. They are very stable and have good solution processability, which means that they can be applied as rare-earth element-free lighting phosphors. This study can provide ideas and a theoretical basis for designing cuprous iodide cluster luminescent materials in future. [ABSTRACT FROM AUTHOR]

Two new title MOFs, [Zn(BTA)2]n (LMOF-1) and [Zn3(BTA)2(5-tbuip)2]n (LMOF-2) (BTA = 1H-benzotriazole, 5-tbuip = 5-tert-butylisophthalic acid), have been synthesized by a solvothermal method. The structures of the two complexes have been determined by single-crystal X-ray diffraction analysis and further characterized by elemental analysis, IR spectroscopy, powder X-ray diffraction (PXRD) and thermogravimetric (TG) analysis. And the calculation of PLATON displays that the porosity values are 15.04% and 18.77%. Fluorescence analysis reveals that the two MOFs generate strong blue luminescence; LMOF-1 and LMOF-2 can be regarded as multiresponsive fluorescence sensors for Fe(III) and Cr(VI) (CrO42−/Cr2O72− ions) detection with high sensitivity and selectivity and a low detection limit in water via fluorescence quenching. It is worth noting that most LMOFs for detecting Ag+ to date are mainly formed with rare earth lanthanide metals, while there are still few Zn-based LMOF probes used in Ag+ detection. LMOF-1 can detect trace Ag+ in water with a low detection limit. In addition, LMOF-1 has excellent water stability and thermal stability, and is an excellent material for detecting Ag+ in daily water samples. [ABSTRACT FROM AUTHOR]

• A new 3D metal-organic framework [Zn(Titpe)(bcpf)•(DMF)] n was successfully constructed by solvothermal method at 90 ℃ with tetraphenylethene (TPE)-core ligands. It shows good AIE luminescence characteristics, and shows strong blue emission in the solid state. Compound 1 has higher detection sensitivity for metal cations (Fe3+) and for anions (Cr 2 O 7 2− and CrO 4 2−). Therefore, compound 1 has good fluorescence properties and can be used as a cheap and efficient chemical sensor. A new 3D luminescent Zinc (II) metal-organic framework, has been solvothermally synthesized by using Zn(NO 3) 2 ⋅4H 2 O and a mixture of ligands: Titpe ligand and bcpf ligand. The molecular formula is [Zn(Titpe)(bcpf)•(DMF)] n, (Compound 1 , Titpe = 1,1,2,2-tetrakis(4-(1H-imidazol-1-yl)phenyl)ethane, bcpf= 4,4΄-sulfonyldibenzoic acid). Compound 1 crystallizes in the triclinic system, space group P -1, with a=12.9990(9), b=14.2181(10), c=14.3781(10) Å, α = 89.974(4)°, β = 71.640(4)°, γ = 80.732(4)°, V = 2485.6(3) Å3, Z = 2, M r = 1039.43, D c =1.389 g/cm3, μ = 0.600 mm−1, F (000) = 1076.0, R = 0.0747 and wR =0.2508 for 9724 observed reflections (I > 2 σ (I)). Topology analysis shows that compound 1 is a double interpenetrating structure. In addition, due to the ligand-to-ligand charge transfer of the TPE chromophore, luminescent spectra of 1 shows that it emits strong blue light. Compound 1 can detect Fe3+ ions with high selectivity and sensitivity among diverse inorganic cations in aqueous solution and is also a highly selective sensing material for CrO 4 2− and Cr 2 O 7 2- ions. A new 3D metal-organic framework [Zn(Titpe)(bcpf)•(DMF)] n was successfully constructed by solvothermal method at 90 ℃ with tetraphenylethene (TPE)-core ligands. It shows good AIE luminescence characteristics, and shows strong blue emission in the solid state. Compound 1 has higher detection sensitivity for metal cations (Fe3+) and for anions (Cr 2 O 7 2− and CrO 4 2−). Therefore, compound 1 has good fluorescence properties and can be used as a cheap and efficient chemical sensor. [Display omitted] [ABSTRACT FROM AUTHOR]

Three novel inorganic-organic hybrid materials, [PbI 3 (BTA-1)] n (1) (BTA-1 = N -((1 H -benzotriazole-1-yl)methyl)- N , N -dimethyl ethylammonium)，[Cu 2 I 3 (BTA-2)] n (2) (BTA-2 = 1-(1 H -benzotriazole-1-yl)- N , N , N -trimethylammonium carbamate) and [ZnI 3 (BTA-3)] n (3) (BTA-3 = 3-(1 H -benzotriazole-1-yl)- N , N , N -trimethylpropane-1-ammonium), have been was prepared by a solvent volatilization method. All three complexes have been characterized by single-crystal X-ray diffraction, powder X-ray diffraction (PXRD) and thermogravimetric (TG) analysis. Based on different metal iodides, they stack in different structural modes with different cluster cores, such as [PbI 6 ]2- in complex 1 , [Cu 4 I 6 ]2- in complex 2 and [ZnI 3 N]2- in complex 3. The fluorescence analysis show that complex 1 and 2 produced green light when the excitation wavelength was 318 nm and 328 nm, respectively. While complex 3 exhibited near white light when the excitation wavelength was 424 nm (CIE: 0.332, 0.395). It shows that complex 3 can be used as a white light emitting material for direct blue light excitation. By solvent volatilization method, three late-model inorganic-organic hybrid materials, [PbI 3 (BTA-1)] n (1)，[Cu 2 I 3 (BTA-2)] n (2) and [ZnI 3 (BTA-3)] n (3) (BTA = 1 H -benzotriazole), have been prepared. The fluorescence properties showed that complex 1 and 2 produced green light respectively. While complex 3 exhibited near white light (CIE: 0.332,0.395). It shows that complex 3 can be used as a white light emitting material for direct blue light excitation. [Display omitted] • Three luminescent inorganic-organic hybrid materials, 1 – 3 , have been was prepared by a solvent volatilization method. • Based on different metal iodides, they stack in different structural modes with different cluster cores, such as [PbI 6 ]2- in 1 , [Cu 4 I 6 ]2- in 2 and [ZnI 3 N]2- in 3. • This regulation realize complexes' emission from green light to near-white light. • Complex 3 exhibited near white light when excited at 424 nm. It shows 3 can be used as a white light emitting material for direct blue light excitation. [ABSTRACT FROM AUTHOR]