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Alfonso Martinez-Felipe
Researcher at University of Aberdeen
Publications - 55
Citations - 1696
Alfonso Martinez-Felipe is an academic researcher from University of Aberdeen. The author has contributed to research in topics: Liquid crystal & Phase (matter). The author has an hindex of 22, co-authored 51 publications receiving 1380 citations. Previous affiliations of Alfonso Martinez-Felipe include Polytechnic University of Valencia & King's College, Aberdeen.
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Journal ArticleDOI
Reversible Isothermal Twist–Bend Nematic–Nematic Phase Transition Driven by the Photoisomerization of an Azobenzene-Based Nonsymmetric Liquid Crystal Dimer
Daniel A. Paterson,Daniel A. Paterson,Jie Xiang,Gautam Singh,Rebecca Walker,Dena Mae Agra-Kooijman,Alfonso Martinez-Felipe,Min Gao,John Storey,Satyendra Kumar,Oleg D. Lavrentovich,Corrie T. Imrie +11 more
TL;DR: The dramatic changes in TNTBN provide evidence that the transition between the normal nematic and twist-bend nematic with spontaneous breaking of chiral symmetry is crucially dependent on the shape of molecular dimers, which changes greatly during the trans-cis isomerization.
Journal ArticleDOI
A Twist‐Bend Nematic Phase Driven by Hydrogen Bonding
Suzanne M. Jansze,Alfonso Martinez-Felipe,John Storey,Antonius T. M. Marcelis,Corrie T. Imrie +4 more
TL;DR: Temperature-dependent FTIR spectroscopy reveals differences in hydrogen bonding between the two nematic phases shown by CB6OBA which suggest that the open hydrogen-bonded complexes may play an important role in stabilizing the helical arrangement found in the twist-bend nematic phase.
Journal ArticleDOI
Spontaneous chirality through mixing achiral components: a twist-bend nematic phase driven by hydrogen-bonding between unlike components.
Rebecca Walker,Damian Pociecha,Jordan P. Abberley,Alfonso Martinez-Felipe,Daniel A. Paterson,Ewan Forsyth,G. B. Lawrence,Peter A. Henderson,John Storey,Ewa Gorecka,Corrie T. Imrie +10 more
TL;DR: The liquid crystalline behaviour of two molecular complexes assembled by hydrogen bonding between a stilbazole-based template and alkoxybenzoic acids has been characterised and exhibit the heliconical twist-bend nematic phase (NTB) over a broad temperature range.
Journal ArticleDOI
The role of hydrogen bonding in the phase behaviour of supramolecular liquid crystal dimers
TL;DR: The phase behavior of equimolar mixtures of 4-octyloxybenzoic acid, OOBA, and either 1-(4butylazobenzene-4′-oxy)-6-(4-oxypyridine)pentane, BuABO5OPyr, or 1-( 4-butylaxobenzenesene- 4′-ox)-6-4-oxy)hexane,BuABO6OPyr is reported in this paper.
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Hydrogen bonding and liquid crystallinity of low molar mass and polymeric mesogens containing benzoic acids: a variable temperature Fourier transform infrared spectroscopic study
TL;DR: In this paper, the phase behavior and mesomorphism of poly(4-(6-propenoyloxyhexyloxy)benzoic acid) (PPOHBA) and POBA were studied using variable-temperature Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction.