Syntheses and Characterizations of(CH3CH2CH2CH2NH3)6(BiI6)(I)2I3 and (NH3CH2CH2NH3)2Bi2I10

The title compounds have been respectively synthesized by solution process and solvothermal reaction=and their crystal structures were determined by X-ray diffraction method.For(CH3CH2CH2CH2NH3)6(BiI6)(I)2I3 1=it crystallizes in triclinic=space group P1 with Mr=2049.76=a=8.5719(1)=b=11.7461(3)=c= 15.700(1)=V=1451.4(1)3=Z=1=Dc=2.345 g/cm3=F(000)=924=μ(MoKα)=8.907 mm-1=T=293(2) K=the final R=0.0655 and wR=0.0804 for 2399 observed reflections with I > 2σ(I).For(NH3CH2CH2NH3)2Bi2I10 2=it crystallizes in monoclinic=space group P21/n with Mr=1811.20=a=8.434(4)=b=13.862(6)=c=13.362(6)=V=1499.9(12)3=Z=2=Dc=4.010 g/cm3=F(000)=1536=μ(MoKα)=22.007 mm-1=T=293(2) K=the final R=0.0584 and wR=0.1451 for 1798 observed reflections with I > 2σ(I).The structures of 1 and 2 contain halobismuthate monomer and dimers=respectively.It is noteworthy that the dimers and their organic counters in 2 connect each other by N···I hydrogen bonds to form a layered structure=and the electrostatic interactions and crystal packing forces between layers give rise to the packing of the crystal.The optical absorption spectra of 1 and 2 reveal the appearance of sharp optical gaps of 2.13 and 2.01 eV=respectively.