000149855 001__ 149855 000149855 005__ 20250128160610.0 000149855 0247_ $$2doi$$a10.1039/d0tc05658h 000149855 0248_ $$2sideral$$a124330 000149855 037__ $$aART-2021-124330 000149855 041__ $$aeng 000149855 100__ $$0(orcid)0000-0002-3576-5156$$aHerrer, L.$$uUniversidad de Zaragoza 000149855 245__ $$apH control of conductance in a pyrazolyl Langmuir-Blodgett monolayer 000149855 260__ $$c2021 000149855 5060_ $$aAccess copy available to the general public$$fUnrestricted 000149855 5203_ $$aIn this contribution, pyrazole is identified as an excellent anchoring group capable of forming well-ordered Langmuir-Blodgett (LB) monolayers onto gold substrates. In contrast, the formation of self-assembled (SA) monolayers is prevented due to the extraction of gold atoms from the surface upon the incubation process required for the formation of these films. The electronic coupling strength of pyrazole-gold junctions is explored through evaluation of the electrical properties of LB films incorporating a double pyrazole terminated molecular wire, namely 1, 4-bis(1H-pyrazol-4-ylethynyl)benzene, 1; these electrical properties are compared with those of molecules having a similar chemical structure, geometry and length. The conductance value for LB films of1is high when the monolayer is transferred from a Langmuir film prepared onto a basic subphase, 1.19 × 10-4G0, as it is more than four times larger than the conductance of the same compound incorporated on a LB film prepared from a water subphase, 0.27 × 10-4G0. These results are interpreted in terms of the deprotonation of the pyrazole group in a basic media that leads to the formation of the pyrazolate (deprotonated pyrazole) moiety. This results in a more efficient electronic coupling with the gold tip of the scanning tunnelling microscope used for film characterization. 000149855 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E31-20R$$9info:eu-repo/grantAgreement/ES/DGA/LMP33-18$$9info:eu-repo/grantAgreement/ES/MICINN/MAT2016-78257-R$$9info:eu-repo/grantAgreement/ES/MICINN/PID2019-105881RB-I00 000149855 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/ 000149855 590__ $$a8.067$$b2021 000149855 591__ $$aPHYSICS, APPLIED$$b24 / 161 = 0.149$$c2021$$dQ1$$eT1 000149855 591__ $$aMATERIALS SCIENCE, MULTIDISCIPLINARY$$b71 / 344 = 0.206$$c2021$$dQ1$$eT1 000149855 592__ $$a1.608$$b2021 000149855 593__ $$aMaterials Chemistry$$c2021$$dQ1 000149855 593__ $$aChemistry (miscellaneous)$$c2021$$dQ1 000149855 594__ $$a11.8$$b2021 000149855 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion 000149855 700__ $$0(orcid)0000-0001-9193-3874$$aMartín, S.$$uUniversidad de Zaragoza 000149855 700__ $$aGonzález-Orive, A. 000149855 700__ $$aMilan, D.C. 000149855 700__ $$aVezzoli, A. 000149855 700__ $$aNichols, R.J. 000149855 700__ $$0(orcid)0000-0001-9866-6633$$aSerrano, J.L.$$uUniversidad de Zaragoza 000149855 700__ $$0(orcid)0000-0002-4729-9578$$aCea, P.$$uUniversidad de Zaragoza 000149855 7102_ $$12013$$2765$$aUniversidad de Zaragoza$$bDpto. Química Orgánica$$cÁrea Química Orgánica 000149855 7102_ $$12012$$2755$$aUniversidad de Zaragoza$$bDpto. Química Física$$cÁrea Química Física 000149855 773__ $$g9, 8 (2021), 2882-2889$$pJ. mater. chem. C$$tJOURNAL OF MATERIALS CHEMISTRY C$$x2050-7526 000149855 8564_ $$s562316$$uhttps://zaguan.unizar.es/record/149855/files/texto_completo.pdf$$yPostprint 000149855 8564_ $$s643217$$uhttps://zaguan.unizar.es/record/149855/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint 000149855 909CO $$ooai:zaguan.unizar.es:149855$$particulos$$pdriver 000149855 951__ $$a2025-01-28-14:57:21 000149855 980__ $$aARTICLE