32812-89-8Relevant academic research and scientific papers
Structural Tunability and Diversity of Two-Dimensional Lead Halide Benzenethiolate
Coffey, Aidan H.,Yoo, Pilsun,Kim, Dong Hee,Akriti,Zeller, Matthias,Avetian, Sona,Huang, Libai,Liao, Peilin,Dou, Letian
, p. 6599 - 6607 (2020/04/15)
Two-dimensional (2D) organic-inorganic hybrid materials are currently of great interest for applications in electronics and optoelectronics. Here, the synthesis and optical properties of a new type of halide-organothiolate-mixed 2D hybrid material, Pb2X(S-C6H5)3, are reported, in which X is a halide (I, Br, or Cl). Different from conventional lead-based 2D layered materials, these compounds feature unusual five-coordinated lead centers with a stereochemically active electron lone pair on the lead atoms and four-coordinated iodine atoms. The Pb2X(S-C6H5)3 materials feature an indirect bandgap, strongly emissive long-lived self-trap states, and an extremely large Stokes shift. Interestingly, the optical bandgap of the materials can be tuned through variation of the halides; however, the photoluminescence is less sensitive to the composition and is more likely dominated by lead-sulfur lattice interactions or the lead lone-pair electrons. Our results support that a halide–organothiolate mixed anion hybrid structure offers a unique platform for discovering new exciting 2D electronic materials.
Direct electrochemical synthesis of benzenethiolato complexes of tin(II), tin(IV), and lead(II). Molecular structure of the 2,2′-bipyridine adduct of Sn(SC6H5)4
Hencher, J. Lawrence,Khan, Masood,Said, Farouq F.,Sieler, Robert,Tuck, Dennis G.
, p. 2787 - 2791 (2008/10/08)
The electrochemical oxidation of tin into solutions of RSH (R = C6H5 C6H4CH3) gives Sn(SR)2. When 2,2′-bipyridine (bpy) or 1,10-phenanthroline is added to the solution phase, the product is the tin(IV) species Sn(SR)4L. The electrochemical oxidation is shown to involve Sn(II) as the first product in each case. The crystal structure of Sn(SC6H5)4bpy is monoclinic, with a = 13.150 (5) ?, b = 17.438 (6) ?, c = 14.215 (6) ?, β = 93.49 (3)°, V = 3254 (2) ?3, Z = 4, and space group P21/n (C2h5, No. 14). The molecule has a distorted octahedral SnS4N2 kernel, with bond distances of 2.449 (Sn-S) and 2.331 ? (Sn-N). With a lead anode, the product is Pb(SC6H5)2; no lead(IV) species could be isolated.
The Chemistry of (Cyclopentadienyl)phenyl-lead(IV) Compounds
Gaffney, Christine,Harrison, Philip G.
, p. 1055 - 1060 (2007/10/02)
The yellow air-stable (cyclopentadienyl)phenyl-lead(IV) compounds, PbPh(4-n)(cp)n , have been synthesised by the reaction of the corresponding phenyl-lead(IV) chloride and lithium cyclopentadienide in diethyl ether.Crystals of PbPh3(cp) are monoclinic, space group P21/c, with a = 9.5426, b = 12.3843, c = 16.1714 Angstroem, β = 102.3358 degree, and Z = 4, and comprise discrete non-interacting molecules with a distorted tetrahedral geometry.The Pb-C(cp) bond distance is significantly longer than the Pb-C(Ph) distances , indicating a substantial weakening of this bond.The endocyclic C-C bonds of the cyclopentadienyl ring (which is planar) are consistent with a concentration of ?-electron density over the carbon atoms remote from the lead.Reaction of PbPh3(cp) with acetic acid, thiophenol, and imidazole proceeds with exclusive Pb-C(cp) bond cleavage affording PbPh3(O2CMe), PbPh3(SPh), and PbPh3(N2C3H3), respectively.Only PbPh4 was isolated from the reaction with 4-chlorophenol.The compound PbPh2(cp)2 decomposes on attempted sublimation at 60-70 deg C and 0.01 mmHg giving Pb(cp)2, whilst reaction with hidrogen chloride, carboxylic acids, and imidazole yields the corresponding diphenyl-lead(IV) derivative.Cleavage of all four Pb-C bonds occurs on reaction with thiols, when lead(II) thiolates are the products.Reaction with phenols yields products of composition n which presumably contain metal-metal bonds.The mechanisms of the reactions are discussed.
