Current Organic Chemistry - Volume 17, Issue 24, 2013

“Thus, the following things are by natural law common to all – the air, running water, the sea and consequently the seashore” [1]. The natural environment, including products derived from it such as food and water, can be subject to contamination from agriculture and industry. This has always been the case since chemicals have been employed to improve agricultural yields, control pests or in the manufacture of industri Read More

Banana plantations in tropical humid regions require a high input of pesticides. Given the long history of this practice, a number of pesticides that are now banned have accumulated in these soils. Little is known about the sorption of two banned insecticides, chlordecone and cadusafos, which are known to cause adverse environmental and health effects. We studied the sorption-desorption characteristics (Freundlich sorption-d Read More

Soil organic matter (SOM) holds a prominent place among the many indicators that are studied in relation to soil function. Different viewpoints are reflected in characterizing SOM, depending on the study procedures used, or the focus of the researchers. There are many possibilities for the isolation and fractionation of SOM and this has led to a plurality of interpretations and conclusions. Transformations to organic materials Read More

This review focuses on the chemical nature of that fraction of already dissolved organic matter into soil solution, or extracted by mild extractants, which is truly readily available for microbial activity and, consequently, more sensitive than total soil organic matter to changes in management and/or environmental conditions. In particular, we deal with low molecular weight compounds such as monosaccharides, amino sugars a Read More

Losses of soil organic carbon often occur because of intensive agricultural practices that lead to removal of organic carbon following harvest production and to insufficient inputs. Organic amendments can be very appropriate for enhancing organic carbon content in very stressed agricultural soils. By enhancing soil organic matter, they generally play an important role in environmental matrices due to their capacit Read More

To effectively characterise and distinguish between different organic matter samples, multiple chemical characterisation techniques are often employed. Due to the structural complexity of organic matter and the unique information provided by different characterisation techniques, it is often difficult to compare and combine data obtained from different analytical methods. In this study, we show how non-parametric mul Read More

High Resolution Magic Angle Spinning (HR-MAS) NMR spectroscopy is a versatile technique that provides high resolution NMR data on samples containing solutions, gels and swellable solids. In addition to providing structural information HR-MAS can also be used to investigate interfaces (for example organic structures at the solid-aqueous soil interface), processes such as swelling/ flocculation, kinetic transfer between gel/liqu Read More

This review is a survey of recent advances in environment related aspects of organic photochemistry. Besides presenting general concepts, the manuscript is mainly focused on the photoreactivity of natural organic matter, and on the photochemistry of anthropogenic substances under natural light irradiation.

Protonation of local anesthetics, LA, and their inclusion complexes with cyclodextrins, CD, are the central issue of this review. The physicochemical properties of LA, such as acid-base character, are crucial to understand their behavior because their capacity to reach and to block sodium channels and act as anesthetics, depends on their protonation state. Consequently, different techniques that are used to determine acid Read More

Hydrogen bonding facilitated self-assembly is an appealing strategy for constructing advanced molecular architecture. Arrays of quadruply hydrogen-bonding (QHB) modules are especially appealing due to the reason that it features extremely strong yet reversible and dynamic interactions. This review focus on the design and development of polymeric materials utilizing QHB arrays such as 2- ureido-4[1H]-pyrim Read More

Herein, we describe the synthesis of a series of rac-N,N'-dibenzylpropane-2-aryl-substituted imidazolidines prepared from the corresponding aromatic aldehydes and two N,N'-dibenzylpropane-1,2-diamines, namely rac-N,N'-dibenzylpropane-1,2-diamine 3a and rac-2,2'-[propane-1,2-diylbis(iminomethanediyl)]diphenol 3b, produced by the NaBH4 reduction of the corresponding diimines of benzaldehyde and salicylaldehyde.

Porphyrins are tetrapyrrolic macrocycles with a fascinating and multifarious variegation of properties of essential significance in up-to-date and leading technologies. This class of compounds exhibits very attractive properties as for well established synthetic paths, advantageous photophysical characteristics, high sensitivity, selectivity, response and recovery times, and reproducibility in sensors. Porphyrins solutio Read More

An ortho halogenation of arylurea derivatives has been developed via palladium-catalyzed C-H bond activation. The reactions were regio-selective, facile and afforded good to excellent product yields under mild conditions.