Tag Archives: one-bond proton-carbon coupling constants

PhD Thesis by Laura Castañar: Pulse Programs and Data Set Examples

2015-05-31Methods & Applications, News from the SeRMN, NMR Events & Courses, Our Publications, Our Researchaligned-media, coupling-constants, enantiodifferentiation, enhanced resolution, full sensitivity, heteronulear coupling constants, HOBS, HOBS-HSQC, HOBS-HSQC-TOCSY, HOBS-HSQMBC, HOBS-TOCSY, homodecoupling, homonuclear decoupling, HSQC, HSQMBC, J-resolved, multi-slice selection, multiple frequency pulses, NUS, one-bond proton-carbon coupling constants, perfect HSQC, PhD Thesis, PIP experiments, proton-carbon coupling constants, proton-proton coupling constants, pure in-phase signals, Pure shift, quantitative nmr, RDCs, Relaxation times, residual dipolar couplings, resolution enhancement, SAPS-HSQC, sensitivity enhancement, sign of coupling constants, spectral aliasing, T1-relaxation, T2-relaxation, two-bonds proton-proton coupling constantsLaura

Development and application of modern pure shift NMR techniques and improved HSQC/HSQMBC experiments

In the following links one can find Data Set Examples of each Publication presented in the Thesis Work, as well as the corresponding Pulse Program Code for Bruker. All 2D spectra have been previously phased and 2ii, 2ir, and 2ri files removed, otherwise data sets would be too big. Continue reading PhD Thesis by Laura Castañar: Pulse Programs and Data Set Examples →

Review: Recent Advances in Small Molecule NMR: Improved HSQC and HSQMBC Experiments

2015-03-02Methods & Applications, NMR Bibliography, Our Publications, Our ResearchHOBS-HSQC, HOBS-HSQMBC, HSQC, HSQMBC, IPAP, nmr, one-bond proton-carbon coupling constants, perfect HSQC, PIP experiments, proton-carbon coupling constants, pure-shift NMR, quantitative nmr, SAPS-HSQCLaura

“Recent Advances in Small Molecule NMR: Improved HSQC and HSQMBC Experiments” by Laura Castañar and Teodor Parella. Annual Reports on NMR Spectroscopy, 2015, 84:163–232. DOI: 10.1016/bs.arnmr.2014.10.004

A general description of the latest developments in heteronuclear single-quantum correlation and heteronuclear single-quantum multiple bond correlation experiments designed for small molecules at the natural isotopic abundance is reported. Continue reading Review: Recent Advances in Small Molecule NMR: Improved HSQC and HSQMBC Experiments →

Perfect-HSQC experiments: pure in-phase spectra

2014-10-04Methods & Applications, Our Publications, Our Researchheteronulear coupling constants, HSQC, one-bond proton-carbon coupling constants, perfect HSQC, proton-proton coupling constants, pure in-phase signalsLaura

“Suppresión of phase and amplitude J_HH modulations in HSQC experiments” by Laura Castañar, Eduard Sistaré, Albert Virgili, Robert Thomas Williamson and Teodor Parella. Magnetic Resonance in Chemistry, 2014 , 53:115-119. DOI: 10.1002/mrc.4149

The amplitude and the phase of cross peaks in conventional 2D HSQC experiments are modulated by both proton–proton, J_HH, and proton–carbon, ¹J_CH, coupling constants. It is shown by spectral simulation and experimentally that J_HH interferences are suppressed in a novel perfect-HSQC pulse scheme that incorporates perfect-echo INEPT periods. Continue reading Perfect-HSQC experiments: pure in-phase spectra →

Easy measurement of one-bond proton-carbon and geminal proton-proton coupling constants in diastereotopic methylene groups

2014-02-21Methods & Applications, Our Publications, Our ResearchE.COSY, inverse INEPT, methylene spin systems, one-bond proton-carbon coupling constants, residual dipolar couplings, two-bonds proton-proton coupling constantsJosep

“Straightforward measurement of individual ¹J(CH) and ²J(HH) in diastereotopic CH₂ groups” by Josep Saurí, Laura Castañar, Pau Nolis, Albert Virgili and Teodor Parella. Journal of Magnetic Resonance 242 (2014) 33–40. DOI: 10.1016/j.jmr.2014.02.003

The C-H_A cross-peak corresponding to a diastereotopic CH_AH_B methylene spin system exhibits a characteristic 1:0:1 multiplet pattern along the indirect dimension of a ω₁-coupled HSQC spectrum. Continue reading Easy measurement of one-bond proton-carbon and geminal proton-proton coupling constants in diastereotopic methylene groups →

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