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Browsing University of Hertfordshire by Author "McLean, Andrew J."
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Detection of Nitroaromatic and Peroxide-Based Explosives with Amine- and Phosphine-Functionalized Diketopyrrolopyrroles
Warzecha, Monika; Morris, Graeme; McLean, Andrew J.; Calvo-Castro, Jesus; McHugh, Callum J. (2023-06-14)Effective strategies for the detection and identification of explosives are highly desirable. Herein, we illustrate the efficient optoelectronic detection of nitroaromatic and peroxide-based explosives using amine- and ... -
Detection of nitroaromatic vapours with diketopyrrolopyrrole thin films exploring the role of structural order and morphology on thin film properties and fluorescence quenching efficiency
Warzecha, Monika; Calvo-Castro, Jesus; Kennedy, Alan R.; Macpherson, Alisdair N.; Shankland, Kenneth; Shankland, Norman; McLean, Andrew J.; McHugh, Callum J. (2015-01-21)Sensitive optical detection of nitroaromatic vapours with diketopyrrolopyrrole thin films is reported for the first time and the impact of thin film crystal structure and morphology on fluorescence quenching behaviour demonstrated -
Development of a Neutral Diketopyrrolopyrrole Phosphine Oxide for the Selective Bioimaging of Mitochondria at the Nanomolar Level
Abelha, Thais Fedatto; Morris, Graeme; Lima, Sandro; Andrade, Luis; McLean, Andrew J.; Alexander, Cameron; Calvo-Castro, Jesus; McHugh, Callum J. (2020-03-09)Development of novel bioimaging materials that exhibit organelle specific accumulation continues to be at the forefront of research interests and efforts. Among the various subcellular organelles, mitochondria, which are ... -
Impact of substituent effects on the Raman spectra of structurally related N-substituted diketopyrrolopyrroles
Calvo-Castro, Jesus; Warzecha, Monika; McLean, Andrew J.; McHugh, Callum J. (2016-03-31)Control over vibrational frequency modes is important in optimising the performance and behaviour of conjugated organic materials employed as charge transfer mediators and optical components in optoelectronic devices. Raman ... -
Impact of systematic structural variation on the energetics of π−π stacking interactions and associated computed charge transfer integrals of crystalline diketopyrrolopyrroles
Calvo-Castro, Jesus; Warzecha, Monika; Kennedy, Alan R.; McHugh, Callum J.; McLean, Andrew J. (2014-07-28)Control over solid state structure is critical for effective performance in optoelectronic devices bearing π-conjugated charge mediating organic materials. A series of five structurally related N-benzyl-substituted ... -
Intermolecular interactions and energetics in the crystalline π–π stacks and associated model dimer systems of asymmetric halogenated diketopyrrolopyrroles
Calvo-Castro, Jesus; Warzecha, Monika; Oswald, I.D.H.; Kennedy, Alan R.; Morris, Graeme; McLean, Andrew J.; McHugh, Callum J. (2016-03-02)Four novel structurally analogous asymmetric, halogenated N-benzyl substituted diketopyrrolopyrroles (DPP) have been synthesized, and their crystal structures obtained. All four crystal structures exhibit π–π stacks with ... -
Torsional angle dependence and switching of inner sphere reorganisation energies for electron and hole charge transfer processes involving phenyl substituted diketopyrrolopyrroles; a density functional study
Calvo-Castro, Jesus; McHugh, Callum J.; McLean, Andrew J. (2015-02-28)Determination of inner sphere reorganisation energies is important in the development of organic charge mediating materials and electron transfer reactions. In this study, hole and electron inner sphere reorganisation ...