Isopropyl N-[1′-(methoxy­carbon­yl)ferro­cen­yl]carbamate–ethyl N-[1′-(methoxy­carbon­yl)ferrocen­yl]carbamate (0.6/0.4)

Herein we report the crystal structure and synthesis of two cocrystallized complexes, [Fe(C7H7O2)(C9H12NO2)]0.6[Fe(C7H7O2)(C8H10NO2)]0.4. The molecules crystallize as layers in the bc plane with van der Waals interactions allowing the alkyl chains to interact and the ferrocene units to form a herringbone pattern up the c axis. Every second layer is linked via N—H⋯O hydrogen bonding.The two complexes were modelled as disordered in a ratio of 0.60:0.40

Development of a highly sensitive electrochemical sensing platform for the trace level detection of lead ions.

Herein we report for the first time a highly sensitive electrochemical platform for the trace level detection of Pb (ӏӏ) using glassy carbon electrode modifiedwith 1-dodecanoyl-3-phenylthiourea (DPT). The performance of the designed sensor was tested by electrochemical impedance spectroscopy, chronocoulometry, cyclic voltammetry and Square Wave Anodic Stripping Voltammetry (SWASV). The DPT was found to play an efficient role in enhancing the sensing response of the electrode for the detection of lead ions in aqueous samples. A number of experimental conditions such as deposition potential, accumulation time, surfactant concentration, pH, number of scans and supporting electrolytes were examined to optimize conditions for getting intense signal of the target analyte. Linear calibration curve was obtained using SWAS voltammetric data obtained under optimized conditions. The limit of detection with a value of 0.695 μg/L suggests that the designed sensor can sense lead ions even below the permissible concentration level (10 μg/L) recommended by the World Health Organization and Environmental Protection Agency of USA. The designed sensor demonstrated sensitivity, selectivity and stability for the targeted analyte. Percentage recoveries from real water samples with standard deviations of less than 2% suggested precision of the proposed method. Moreover, computational findings supported the experimental outcomes

Simple direct formation of self-assembled N-heterocyclic carbene monolayers on gold and their application in biosensing

CRL acknowledges the Engineering and Physical Sciences Research Council (UK) for the funding of his PhD studentship (EP/M506631).The formation of organic films on gold employing N-heterocyclic carbenes (NHCs) has been previously shown to be a useful strategy for generating stable organic films. However, NHCs or NHC precursors typically require inert atmosphere and harsh conditions for their generation and use. Herein we describe the use of benzimidazolium hydrogen carbonates as bench stable solid precursors for the preparation of NHC films in solution or by vapour-phase deposition from the solid state. The ability to prepare these films by vapour-phase deposition permitted the analysis of the films by a variety of surface science techniques, resulting in the first measurement of NHC desorption energy (158±10 kJ mol−1) and confirmation that the NHC sits upright on the surface. The use of these films in surface plasmon resonance-type biosensing is described, where they provide specific advantages versus traditional thiol-based films.Publisher PDFPeer reviewe

Concepts and Models in Bioinorganic Chemistry

xxvi;ill.;443hal.;26c

Group 6 metal complexes of sulfur and selenium based ligands: synthetic and computational studies; a holistic approach

Bibliography: p. 205-220

Polypeptide-based metallobiopolymers.

abstract: A discussion of recent developments into the preparative and structural aspects of Fc-peptide conjugates is presented. In particular, the use of disubstituted Fc systems to control the structure is highlighted. The recent efforts of incorporating Fc into peptide-like oligo- and polyamides and dendrimers are discussed. A book; Frontiers of Transition Metal-Contg. Polymers; edited by Alaa S. Abd-Aziz and Ian Manners (chapter 12); John Wiley and sons, Inc. (2007). 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Enzyme Entrapment in Amphiphilic Myristyl-Phenylalanine Hydrogels

Supramolecular amino acid and peptide hydrogels are functional materials with a wide range of applications, however, their ability to serve as matrices for enzyme entrapment have been rarely explored. Two amino acid conjugates were synthesized and explored for hydrogel formation. These hydrogels were characterized in terms of strength and morphology, and their ability to entrap enzymes while keeping them active and reusable was explored. It was found that the hydrogels were able to successfully entrap two common and significant enzymes—horseradish peroxidase and -amylase—thus keeping them active and stable, along with inducing recycling capabilities, which has potential to further advance the industrial biotransformation field