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New borophosphates Li3Cs2M2B3P6O24 (M = Pb, Sr) have been synthesized by high-temperature solid-state reactions. The single-crystal X-ray diffraction data reveal their non-centrosymmetric cubic space group P213 and lattice parameters of a = 12.7246(3) Å and 12.687(2) Å and V = 2060.31(8) Å3 and 2042.3(4) Å3 for Li3Cs2Pb2B3P6O24 and Li3Cs2Sr2B3P6O24, respectively. They are three-dimensional (3D) [BP2O8]3−∞ anionic frameworks formed by a new double six-membered ring building unit consisting of BO4 and PO4 units joined alternately. Interestingly, such a double six-membered ring is regarded as the structural variation of the 12-membered ring in the known KSrBP2O8, fusing at the BO4 tetrahedron induced by the coexistence of the Li+ and Cs+ cations with their large size difference. The title compounds show weak SHG intensity and exhibit photoluminescence emissions at 410 nm for Li3Cs2Pb2B3P6O24 and 440 nm for Li3Cs2Sr2B3P6O24. [ABSTRACT FROM AUTHOR]

New borophosphates Li3Cs2M2B3P6O24 (M = Pb, Sr) have been synthesized by high-temperature solid-state reactions. The single-crystal X-ray diffraction data reveal their non-centrosymmetric cubic space group P213 and lattice parameters of a = 12.7246(3) Å and 12.687(2) Å and V = 2060.31(8) Å3 and 2042.3(4) Å3 for Li3Cs2Pb2B3P6O24 and Li3Cs2Sr2B3P6O24, respectively. They are three-dimensional (3D) [BP2O8]3−∞ anionic frameworks formed by a new double six-membered ring building unit consisting of BO4 and PO4 units joined alternately. Interestingly, such a double six-membered ring is regarded as the structural variation of the 12-membered ring in the known KSrBP2O8, fusing at the BO4 tetrahedron induced by the coexistence of the Li+ and Cs+ cations with their large size difference. The title compounds show weak SHG intensity and exhibit photoluminescence emissions at 410 nm for Li3Cs2Pb2B3P6O24 and 440 nm for Li3Cs2Sr2B3P6O24. [ABSTRACT FROM AUTHOR]

The first water soluble maleimide bearing NIR BF2-azadipyrromethene (NIR-AZA) fluorochrome has been synthesised which is capable of rapid thiol conjugations in water with peptides such as glutathione, the cell penetrating peptide (CPP) C(β-A)SKKKKTKV-NH2 and a thiol substituted cRGD. NIR fluorescence imaging showed rapid cellular delivery of the CPP conjugate and effective in vivo tumour localization for the cRGD conjugate. [ABSTRACT FROM AUTHOR]

Using 2,5-dimethyl-1,3,4-thiodiazole (L) as ligand, a series of Ag(i), Cu(ii) and Ni(ii) complexes, namely, [Ag4(μ2-L)6(H2O)2](ClO4)4·2H2O (1), [Ag4(μ2-L)4(μ2-CF3CO2)2(μ3-CF3CO2)2] (2), [Ag2(μ2-L)3(CH3CN)2](AsF6)2 (3), [Ag2(μ2-L)2(μ2-NO3)2]n (4), [Cu(L)2(μ2-NO3)2] (5), [Cu(μ2-L)(μ1,1-N3)3(μ2-CH3COO)]n (6) and [Ni9(μ2-L)6(L)3(μ6-CO3)2(DMF)3(H2O)6(μ3-OH)6]2[Ni9(μ2-L)6(μ6-CO3)2(H2O)12(μ3-OH)6](ClO4)24·9H2O (7) were isolated and their crystal structures determined via single-crystal X-ray diffraction. In 1, six L ligands bridge four neighboring Ag(i) centers forming a tetranuclear cation Ag4 cluster. While in 2, μ3-CF3CO2− anions bridge two pairs of di-nuclear silver(i) clusters forming another type of tetranuclear neutral Ag4 cluster. 3 is a dinuclear Ag(i) complex and 4 is a one-dimensional (1D) chain constructed via dinuclear Ag(i) sub-units, in which μ2-NO3− groups bridge neighboring di-nuclear Ag(i) clusters into a 1D polymeric chain. When Cu(NO3)2 was employed in the reaction system instead of silver(i) salts, a mono-nuclear Cu(ii) complex 5 was obtained. When Cu(Ac)2 and NaN3 were further introduced in to the reaction system of 5 instead of Cu(NO3)2, a 1D copper(ii) chain 6 constructed with dinuclear copper(ii) units was isolated, in which three different types of bridging (μ1,1-azido, acetate and L ligands) can be simultaneously observed. It is interesting that when self-assembly of Ni(ClO4)2·6H2O, L, Na2CO3, and NaN3 in the molar ratio of 4 : 2 : 1 : 8 in CH3OH/DMF/H2O produced well-shaped green crystals of 7. Structural analysis revealed that 7 contains two types of Ni9 clusters with an overall P3̅c1 non-central symmetry. To our knowledge, 7 represents a unique example of M9L6 and M9L9 cages. The result also reveals that it can be expected that using L ligands as precursors has great potential for constructing these functional materials with intriguing structural motifs such as polynuclear metal clusters. Electrospray ionization mass spectrometry measurements studies for 1–4 demonstrate that in a DMSO solution, complex 1 can still retain the form of a tetranuclear silver(i) cluster. In the solid state, complexes 1–4 exhibit strong fluorescent emission bands, which may be assigned to ligand-to-metal charge transfer. The luminescent properties of these complexes in a DMSO solution varied from blue light to green light at ambient temperature. [ABSTRACT FROM AUTHOR]

New borophosphates Li3Cs2M2B3P6O24 (M = Pb, Sr) have been synthesized by high-temperature solid-state reactions. The single-crystal X-ray diffraction data reveal their non-centrosymmetric cubic space group P213 and lattice parameters of a = 12.7246(3) Å and 12.687(2) Å and V = 2060.31(8) Å(3) and 2042.3(4) Å(3) for Li3Cs2Pb2B3P6O24 and Li3Cs2Sr2B3P6O24, respectively. They are three-dimensional (3D) [BP2O8](3-)∞ anionic frameworks formed by a new double six-membered ring building unit consisting of BO4 and PO4 units joined alternately. Interestingly, such a double six-membered ring is regarded as the structural variation of the 12-membered ring in the known KSrBP2O8, fusing at the BO4 tetrahedron induced by the coexistence of the Li(+) and Cs(+) cations with their large size difference. The title compounds show weak SHG intensity and exhibit photoluminescence emissions at 410 nm for Li3Cs2Pb2B3P6O24 and 440 nm for Li3Cs2Sr2B3P6O24.

The first water soluble maleimide bearing NIR BF2-azadipyrromethene (NIR-AZA) fluorochrome has been synthesised which is capable of rapid thiol conjugations in water with peptides such as glutathione, the cell penetrating peptide (CPP) C(β-A)SKKKKTKV-NH2 and a thiol substituted cRGD. NIR fluorescence imaging showed rapid cellular delivery of the CPP conjugate and effective in vivo tumour localization for the cRGD conjugate.