Tin(ii) oxide carbodiimide and its relationship to SnO

Abstract

Sn2O(CN2) was obtained from a solid-state metathesis. Its crystal structure incorporates a Sn2+ ion with a 5s2 lone pair and was analyzed in relation to that of SnO by electronicstructure calculations and a COHP bonding analysis.

Increased photocurrent of CuWO4 photoanodes by modification with the oxide carbodiimide Sn2O(NCN)

“…Sn 2 O(NCN) crystallizes in an orthorhombic crystal structure (space group Pccn) and has Sn 2+ ions situated in a fourfold, mixed O 2− /NCN 2− coordination environment. 23 The carbodiimide anion is closely related to the oxide anion and can be regarded as an N-based pseudo-oxide. 26 For structural characterization, we tested the photoanodes for PEC water oxidation (vide infra) and removed subsequently a part of the thin film for XRD and XPS characterization.…”

“…Li 2 (NCN) was prepared as previously reported by Meyer. 23,25 Equimolar amounts of Li 2 (NCN), Na 2 O and SnCl 2 (Sigma Aldrich 99.999%, ultra dry) were mixed and ground in an agate mortar under argon. Samples of 250 mg were sealed into silica tubes under vacuum and each mixture was heated in a furnace to temperatures ranging from 450 to 500°C.…”

“…The electronic band gaps of CuWO 4 23 This would render both compounds as potential photoanode candidates for water oxidation. The semiconducting type and band edge positions of Sn 2 O (NCN) were determined by MS measurements.…”

“…The oxide carbodiimide representative Sn 2 O(NCN) was obtained recently by Meyer et al as crystalline powder with an optical band gap of approximately 2.0 eV. 23 The title compound is closely related to tin(II) oxide (SnO); a semiconductor with a band gap of 2.8 eV as calculated on the basis of electronic band structure calculations. 24 In this work, we report on the photochemical properties of Sn 2 O(NCN) and the fabrication of heterojunction CuWO 4 /Sn 2 O (NCN) thin film photoanodes.…”

SnCN2: A Carbodiimide with an Innovative Approach for Energy Storage Systems and Phosphors in Modern LED Technology

“…While Sn(SCN) 2 [38] has been identified for many years now, just recently new attempts have been made to find SnCN 2 , which led to Sn 2 O(CN) 2 . [39] Now simultaneously with our patent [40] a new paper of Löber et al [41] just recently appeared indicating the formation of SnCN 2 via the intermediate compound Sn 4 Cl 2 (CN 2 ) 3 . From the application perspective, there are up to now consequently no reports on the materials properties of SnCN 2 ; especially concerning potential luminescence behavior and energy storage investigations.…”