Experimental and theoretical studies of new rhenium carbonyls containing 4,5-bis(chalcogenodiphenylphosphinoyl)-1,2,3-triazolates

4,5‐Bis(diphenylthiophosphinoyl)‐1,2,3‐triazolate interaction with gold nanoparticles and flat surfaces to form self‐assembled monolayers

“…This low‐field shift is not as significant as that reported for phosphine oxides used as stabilizers of AuNPs (around 160 ppm) 56 . The signals at 30.3 and 29.6 ppm (KSPTz signal at 31.6 ppm in THF‐ d 8 ) might be attributable to an uncoordinated PS moiety as it has been reported for metallic compounds having asymmetric coordination of SPTz − 29,31,32 . The presence of these 31 P NMR signals could point to an asymmetric coordination of the ligand as described above.…”

“…The comparison of both SPTzH and KSPTz spectra with that of the adsorbed species exhibits significant differences in intensity of prominent bands, which strongly implies the presence of an adsorbate layer on the AuNPs surface. The intensity of signals below 750 cm −1 , which mainly corresponds to out‐of‐plane triazole ring bending (torsions) (always show up between 600 and 700 cm −1 ), loses intensity upon adsorption, whereas a broad signal at 620 cm −1 is observed and is connected with vibrations of PS and PS stretching modes 29,32,34 . The location of PS/PS vibrations is not usually identified due to its low intensity in the IR spectra and strong dependence on the substituents.…”

“…We focus here on the binding of 4,5‐bis(diphenylthiophosphinoyl)‐1,2,3‐triazolate (SPTz − ) on Au surfaces (nanoparticles, an electrode, and flat sheets). 4,5‐Bis(diphenylthiophosphinoyl)‐1,2,3‐triazole (Scheme 1) was first introduced by Trofimenko as a monoanionic bidentate κ 2 ‐N,S‐ligand in the formation of palladium(II) compounds, 29 similar bidentate coordination mode was informed for Zn(II), Cd(II), and Cu(II) bis ‐chelates 30 and for iridium(I) derivatives 31 and rhenium tetracarbonyls 32 . The tridentate κ 3 ‐S,N,N‐ligand coordination was reported in (R 2 MN 2 ) 2 bimetallic six‐membered rings containing M = Al(III) and In(III), 33,34 rhenium tricarbonyls, 32 and M 2 N 4 six‐membered rings with M = Li, Na, Ca, Sr, and Ba 35,36 .…”

“…4,5‐Bis(diphenylthiophosphinoyl)‐1,2,3‐triazole (Scheme 1) was first introduced by Trofimenko as a monoanionic bidentate κ 2 ‐N,S‐ligand in the formation of palladium(II) compounds, 29 similar bidentate coordination mode was informed for Zn(II), Cd(II), and Cu(II) bis ‐chelates 30 and for iridium(I) derivatives 31 and rhenium tetracarbonyls 32 . The tridentate κ 3 ‐S,N,N‐ligand coordination was reported in (R 2 MN 2 ) 2 bimetallic six‐membered rings containing M = Al(III) and In(III), 33,34 rhenium tricarbonyls, 32 and M 2 N 4 six‐membered rings with M = Li, Na, Ca, Sr, and Ba 35,36 . A combination of binding modes involving four donor atoms 36 and the monodentate κ 1 ‐N coordination mode were observed in [SrI(SPTz}(THF) 3 ] 2 , [Mg 2 (μ‐OH)(SPTz) 3 ] 2 , and in Mg(II) monomeric and K(I) polymeric species 35,36 .…”