论文信息 - Synthesis, crystal structure and optical limiting property of a novel octanuclear silver cluster complex with an aryl selenolate ligand

Synthesis, crystal structure and optical limiting property of a novel octanuclear silver cluster complex with an aryl selenolate ligand

The homoleptic silver aryl selenolate complex [Ag8(2,4,6–Pr3iC6H2Se)8] 1 was synthesized by the reaction of AgNO3 with an equivalent amount of 2,4,6-triisopropylbenzeneselenol (2,4,6-Pr3iC6H2SeH) in MeCN in the presence of triethylamine at room temperature for 4 h. Recrystallization by slow diffusion of CH3OH into a CH2Cl2 solution gave yellow block crystals. The crystal structure determination indicates that the structure of the Ag8Se8 core of complex 1 consists of a compressed distorted Ag8 hexagonal bipyramid embedded in a distorted rhombohedron formed by eight selenium atoms of the aryl selenolate ligands. The cluster exhibits a strong optical limiting effect with threshold of 0.2 J cm−2, which is about 2.5 times lower than that of C60 in toluene under identical experimental conditions.

[1] Jason E. Riggs,et al. Organic and inorganic optical limiting materials. From fullerenes to nanoparticles , 1999 .

[2] M. Kanatzidis,et al. Coordination chemistry of heavy polychalcogenide ligands , 1994 .

[3] Wei Ji,et al. Nanosecond reverse saturable absorption in cubanelike transition-metal clusters , 1995 .

[4] T. F. Boggess,et al. A review of optical limiting mechanisms and devices using organics, fullerenes, semiconductors and other materials , 1993 .

[5] F. Hollander,et al. Synthesis and Characterization of Copper(I) and Silver(I) Tellurolates and Selenolates. The X-ray Crystal Structures of {Cu[SeC(SiMe3)3]PCy3}2 and the Homoleptic Silver Selenolate Ag4[SeC(SiMe3)3]4 , 1994 .

[6] H. Fun,et al. Heterometallic polymeric clusters containing tetraselenotungstate anion: one-dimensional helical chain [[La(Me2SO)8. , 2000, Inorganic chemistry.

[7] P. Mascharak,et al. Nickel(II) complexes with the [NiNxSey] chromophore in different coordination geometries : search for a model of the active site of [feNiSe] hydrogenases , 1992 .

[8] Q. Gong,et al. Optical limiting property of molybdenum complex of fullerene C70 , 2000 .

[9] H. Grützmacher,et al. Darstellung und Kristallstruktur der Kupfer(I)‐chalkogenolat‐2,2′‐Bipyridin‐Komplexe [CuS(2,4,6‐iPr3C6H2)]4(Bipy)2 und [CuSe(2,4,6‐iPr3C6H2)]2(Bipy)2 , 1996 .