Chain order and mobility of high-density c(18) phases by solid-state NMR spectroscopy and liquid chromatography

Analytical Chemistry
M PurschK Albert


C(18) phases prepared by different synthetic pathways are examined by solid-state NMR spectroscopy. Silane functionality is clearly indicated by (29)Si CP/MAS NMR spectroscopy. Order and mobility of the alkyl chains are investigated with high-speed (1)H MAS and (13)C CP/MAS NMR spectroscopy. Differences in coverage are monitored by (1)H line widths,( 13)C chemical shifts, (13)C cross-polarization constants, and (1)H relaxation times in the rotating frame. It is shown that C(18) phases prepared by the surface polymerization technique exhibit a more regular surface coverage than sorbents prepared by conventional polymeric synthesis. The findings from solid-state NMR investigations are discussed in the context of liquid chromatography (LC) separations of linear and bulky polycyclic aromatic hydrocarbon (PAH) solutes.


Nov 30, 2005·Analytical and Bioanalytical Chemistry·Gokulakrishnan SrinivasanKlaus Müller
Apr 14, 2005·Analytical and Bioanalytical Chemistry·Lane C SanderStephen A Wise
Mar 17, 2005·Analytical and Bioanalytical Chemistry·Christopher J Orendorff, Jeanne E Pemberton
May 25, 2010·Analytical and Bioanalytical Chemistry·Jesse O OmamoghoK Albert
Jan 23, 2004·Journal of Chromatography. a·Martha D Bruch, Hafeez O Fatunmbi
Mar 23, 2004·Journal of Chromatography. a·Kenneth E CollinsCarol H Collins
Jan 11, 2000·Journal of Chromatography. a·F M Yamamoto, S Rokushika
Sep 10, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Abraham ChemtobSéverinne Rigolet
Jan 31, 2002·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Chuzo FujimotoTsutomu Takeichi
Apr 23, 2005·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Kazuhiro BanKiyokatsu Jinno
Nov 18, 2005·Journal of Chromatography. a·Luxsana Limsavarn, John G Dorsey
Oct 18, 2005·Journal of Separation Science·Marc David GrynbaumK Albert
May 19, 2011·Chemistry : a European Journal·Hongdeng QiuHirotaka Ihara
Jun 27, 2012·Journal of Separation Science·Szymon Bocian, Boguslaw Buszewski

Related Concepts

Alkylating Agents
Liquid Chromatography
Physiological Aspects
Polycyclic Hydrocarbons, Aromatic
Spectroscopy, Nuclear Magnetic Resonance
Establishment of Cell Polarity

Trending Feeds


Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Synthetic Genetic Array Analysis

Synthetic genetic arrays allow the systematic examination of genetic interactions. Here is the latest research focusing on synthetic genetic arrays and their analyses.

Neural Activity: Imaging

Imaging of neural activity in vivo has developed rapidly recently with the advancement of fluorescence microscopy, including new applications using miniaturized microscopes (miniscopes). This feed follows the progress in this growing field.

Computational Methods for Protein Structures

Computational methods employing machine learning algorithms are powerful tools that can be used to predict the effect of mutations on protein structure. This is important in neurodegenerative disorders, where some mutations can cause the formation of toxic protein aggregations. This feed follows the latests insights into the relationships between mutation and protein structure leading to better understanding of disease.

Congenital Hyperinsulinism

Congenital hyperinsulinism is caused by genetic mutations resulting in excess insulin secretion from beta cells of the pancreas. Here is the latest research.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Epigenetic Memory

Epigenetic memory refers to the heritable genetic changes that are not explained by the DNA sequence. Find the latest research on epigenetic memory here.

Cell Atlas of the Human Eye

Constructing a cell atlas of the human eye will require transcriptomic and histologic analysis over the lifespan. This understanding will aid in the study of development and disease. Find the latest research pertaining to the Cell Atlas of the Human Eye here.

Femoral Neoplasms

Femoral Neoplasms are bone tumors that arise in the femur. Discover the latest research on femoral neoplasms here.