X‐ray structure of host‐guest nanosized organotin supramolecular coordination polymer based on cobalt cyanide and quinoxaline as an efficient catalyst for treatment of waste water

Abstract

New host‐guest supramolecular coordination polymer catalyst 3∞[Co(μ2CN)5(CN)(μ2‐Me3Sn)2(Me3Sn)(H2O)(qox)], SCP1 (qox = quinoxaline) has been synthesized and characterized by single crystal X‐ray diffraction, FT‐IR, UV/Visible and fluorescence spectra, thermal and elemental analyses. The tin atoms act as bridges connecting the Co (CN)6 building blocks. The structure of SCP1 exhibits an unusual self‐coordinated host‐guest 3D network with qox as guest molecule. Also, the nanosized1\ was prepared under ultrasonic irradiation while the morphological features of both were examined by TEM and SEM. SCP1 and nanosized1\ are used as heterogeneous catalysts for removal of toxic dyes under UV and ultrasonic irradiation. The results show high effectively decolorized of indigo carmine dye (IC) without generation of any hazardous wastes or byproducts. The reaction is first order with respect to IC, while the factors affecting the rate constant of the degradation reaction are investigated. Mineralization of IC was investigated by IR and UV spectra. The trapping experiments were carried out to determine the role of active species used for degradation of the dye. The activation parameters of the reaction have been estimated and a possible mechanism of degradation was proposed and discussed in detail.

Retraction Note: Chemical, electrochemical and surface studies of new metal–organic frameworks (MOF) as corrosion inhibitors for carbon steel in sulfuric acid environment

“…Specifically: Figures 1, S1 and S2 appear highly similar to Figures 1, 2 and 3 in [ 1 ]; Figure 2 appears highly similar to Figure 1 in [ 2 ]; Figure 12 appears highly similar to Figure 14 in [ 3 ]; Table 3 appears to overlap with Table 1 in [ 1 ], with the exception of the parameter "Formula weight". …”

Ultrasound irradiation synthesis and crystal structure of Co(II) thiocyanate supramolecular complex: Photocatalytic and sonocatalytic degradation of methyl violet 2B dye

“…Physical measurements are similar to those in our prior works. [6] Perkin-Elmer 2400 automatic elemental analyzer was used to record microanalyses (C, H, N). Cobalt was determined using Perkin-Elmer 2380 atomic absorption spectrometer.…”

“…where A 0 and A t represent absorbance of dye at time 0 and t. 6 .H 2 O], SC, which is tin-free SC. The red crystals of SC are prepared by self-assembly method at ambient conditions using the sonochemical method.…”

“…[5] So the removal of hazardous dyes from wastewater is a big challenge to protect and conserve our environment. There are several methods and strategies employed to realize this target such as radiation catalytic degradation, [6][7][8] adsorption, [9] biological removals, [10] and advanced oxidation processes (AOPs). [11] Radiation catalysis is an auspicious method for water purification.…”