Dithiocarbamate

About: Dithiocarbamate is a research topic. Over the lifetime, 2996 publications have been published within this topic receiving 41318 citations. The topic is also known as: dithiocarbamates.

Sensing polycyclic aromatic hydrocarbons with dithiocarbamate-functionalized ag nanoparticles by surface-enhanced Raman scattering.

Abstract: Trace detection of polycyclic aromatic hydrocarbons is reported in this work on dithiocarbamate calix[4]arene functionalized Ag nanoparticles by using surface-enhanced Raman scattering (SERS) SERS spectra informed about the existence of the pollutant by measuring its characteristic fingerprint vibrational features In addition, SERS revealed important structural information from both the host and the analyte which was crucial to understand and deduce the host−guest interaction mechanism The effectiveness of this system was checked for a group of PAHs: pyrene, benzo[c]phenanthrene, triphenylene, and coronene From the analyzed results, the affinity constants and the limit of detection were deduced for each pollutant

Dithiocarbamates: Functional and Versatile Linkers for the Formation of Self-Assembled Monolayers

Abstract: Self-assembled monolayers have evolved into one of the best established self-assembly systems with high relevance in a scientific and applied context So far, however, virtually exclusively thiol functional groups have been used for the investigation of fundamental processes on metal surfaces In this paper, an alternative binding group, the dithiocarbamate (DTC) group, is re-visited Complete SAM formation with new layer properties characteristically different from thiol SAMs is demonstrated for mono-functional acyclic and bifunctional cyclic dithiocarbamates on Au(111) by X-ray photoelectron spectroscopy, cyclic voltammetry, and scanning tunneling microscopy Furthermore, the chemical adsorption and voltammetric desorption reactions are quantitatively determined The resonant bi-dentate structure of the DTC provides a characteristically different molecule−metal coupling compared to the thiols and makes the DTC an interesting system for molecular electronics

Fluorescence “Turn On” Detection of Mercuric Ion Based on Bis(dithiocarbamato)copper(II) Complex Functionalized Carbon Nanodots

Abstract: A new “turn on” fluorescence nanosensor for selective Hg2+ determination is reported based on bis(dithiocarbamato)copper(II) functionalized carbon nanodots (CuDTC2-CDs). The CuDTC2 complex was conjugated to the prepared amine-coated CDs by the condensation of carbon disulfide onto the nitrogen atoms in the surface amine groups, followed by the coordination of copper(II) to the resulting dithiocarbamate groups (DTC) and finally by the additional coordination of ammonium N-(dithicarbaxy) sarcosine (DTCS) to form the CuDTC2-complexing CDs. The CuDTC2 complex at surface strongly quenched the bright-blue fluorescence of the CDs by a combination of electron transfer and energy transfer mechanism. Hg2+ could immediately switch on the fluorescence of the CuDTC2-CDs by promptly displacing the Cu2+ in the CuDTC2 complex and thus shutting down the energy transfer pathway, in which the sensitive limit for Hg2+ as low as 4 ppb was reached. Moreover, a paper-based sensor has been fabricated by printing the CuDTC2-CDs p...

The Mechanism of Zinc(II)-Dithiocarbamate-Accelerated Vulcanization Uncovered; Theoretical and Experimental Evidence

Abstract: The mechanism of cross-link formation in sulfur vulcanization mediated by bis(dimethyldithiocar- bamato)zinc(II), ZDMC, has been uncovered, utilizing a combination of Density-Functional calculations and model experiments. These studies have revealed that, in a three-stage process, ZDMC exhibits a unique combination of catalytic activity: (1) It mediates the reaction between sulfur and rubber. This is achieved by incorporating sulfur atoms in the zinc-dithiocarbamate ring and inducing their insertion into an allylic C -H bond via an ene-like reaction. This ene reaction yields a rubber-bound polythiothiol and is only slightly endothermic, even though an activation energy of 90 kJ mol -1 is required. (2) The resulting polythiothiols engage in equilibrated metathesis reactions to yield polysulfides, the initial sulfur cross-links. (3) In a hitherto unsuspected mechanistic step ZDMC has been found to shift the metathesis equilibrium to the side of cross- links by mediating desulfhydration of the polythiothiols, producing sulfides and H 2S. Thus, the combined results of theoretical and experimental work have allowed to put forward a novel mechanism for ZDMC- mediated sulfur cross-link formation that successively comprises (a) homogeneous catalysis of thiol formation from sulfur and rubber, (b) an equilibrium between polythiothiol intermediates and cross-links and (c) ZDMC- induced desulfhydration.