‐NO and ‐CN directed Metal Organic Ionic Framework used for Concentration Responsive Adsorption of Organic Pollutant, Bovine Serum Albumin and 2,2‐Diphenyl‐1‐Picrylhydrazyl

Abstract

We describe the synthesis and characterization of Metal Organic Ionic Framework (MOIF) product of ionic association of [Fe(CN)6]4−/ [Fe(CN)6]3−/ [Fe(CN)5NO]2− and Cetylpyridinium ion via an ion exchange reaction in water. Raman and powder XRD measurements were used to characterize their structures. Simultaneous fitting of small angle X‐ray Scattering (SAXS) is performed in order to obtain an accurate description of the system. The anionic metal complex and Cetylpyridinium are strongly electrostatic bonded to each other those are investigated with UV/ Vis and FTIR spectra. Their dye, protein and free radical adsorption studies have revealed their importance in material research. The Langmuir isotherm has been used to estimate the interaction between adsorbate and adsorbent with the equilibrium isotherm; characteristics for the adsorption system. Ameta‐Nature‐Activity–Relationship model is proposed to understand the role of oxidation states and similarity and dissimilarity of ligands associated with central metal ion accounTable for strong and weaker adsorption.

Power of Infrared and Raman Spectroscopies to Characterize Metal-Organic Frameworks and Investigate Their Interaction with Guest Molecules

“…For MOFs with μ 3 -CN coordination (carbon bonded to two Cu atoms and nitrogen to one, respectively), the ν(C−N) mode appears at 2104− 2071 cm −1 . The ν(C−N) mode for a series of iron cyanob a s e d M O F s ( [ C 1 6 H 3 3 ( C 5 H 5 N + ) ] 4 [ F e ( C N ) 6 ] , [C 16 H 33 (C 5 H 5 N + )] 3 [Fe(CN) 6 ] and [C 16 H 33 (C 5 H 5 N + )] 2 [Fe-(CN) 5 (NO)]) was detected at 2145 cm −1 317. Fe 3+ hexacyanocobaltate shows an IR band at 2120 cm −1 (attributed to inplane vibrations of the metal−carbon−nitrogen bond).…”

Superior Adsorptive Removal of Anionic Azo Dyes from Aqueous Solutions Using Sulfonic Acid Group-Modified MIL-101@Graphene Oxide Composite

“…36 According to the basic hypothesis of Langmuir, the adsorption sites of the adsorbent are distributed homogeneously and that monolayer coverage occurs on the adsorbent surface. 38,39 On the other hand, the Temkin model predicts that the adsorption energy declines linearly with increasing coverage. 40,41 For the adsorption of CR, MO, AO7, and AOG to MIL-101-SO 3 H@GO, the Langmuir model fitted more accurately than the other two, as confirmed by the R 2 value (Tables S3−S6).…”

[Fe(CN)5NO]2–-Based MOIFs for Adsorption of Organic Pollutants and as a Self-Rotatory Motor

“…When comparing MOIFs with constant hydrophilicity, the hydrophobicity increased as Dt-NP < T-NP < H-NP due to an increase in the alkyl chain length in the same order. Due to this, the increased adsorption was found as a combined effect of hydrophilicity and hydrophobicity . The thermodynamics of dye adsorption informs about the effect of temperature on thermodynamic parameters such as Gibbs function change (Δ G 0 ), standard enthalpy change (Δ H 0 ), and standard entropy change (Δ S 0 ).…”

“…Due to this, the increased adsorption was found as a combined effect of hydrophilicity and hydrophobicity. 28 The thermodynamics of dye adsorption informs about the effect of temperature on thermodynamic parameters such as Gibbs function change (ΔG 0 ), standard enthalpy change (ΔH 0 ), and standard entropy at all chosen temperatures. It indicates the dependence of adsorption on the functional groups, interacting sites, and hydrophobic/hydrophilic domains of the chosen dyes.…”