000152985 001__ 152985
000152985 005__ 20250403160453.0
000152985 0247_ $$2doi$$a10.1039/c9tc04710g
000152985 0248_ $$2sideral$$a116393
000152985 037__ $$aART-2020-116393
000152985 041__ $$aeng
000152985 100__ $$0(orcid)0000-0001-6189-1642$$aEscorihuela, Enrique$$uUniversidad de Zaragoza
000152985 245__ $$aTowards the design of effective multipodal contacts for use in the construction of Langmuir-Blodgett films and molecular junctions
000152985 260__ $$c2020
000152985 5060_ $$aAccess copy available to the general public$$fUnrestricted
000152985 5203_ $$aAs part of on-going efforts to optimize the electrical performance and stability of molecular electronic components, anchor groups that bind molecules to electrode surfaces via multiple points of connection (multipodal contacts) have begun to attract attention. Here an oligo(arylene)ethynylene (OAE) derivative with ''tripodal'' 2, 6-bis((methylthio)methyl)pyridine anchoring groups at both molecular termini has been prepared and used to form well-ordered monolayer Langmuir films at the air-water interface. These films were transferred onto solid supports (surface pressure of transference 8 mN m(-1)) to give homogeneous, densely packed, monolayer Langmuir-Blodgett (LB) films, which efficiently block a gold electrode surface. Within the surface-supported LB film, the molecules are oriented with a tilt angle of approximately 30 degrees to the surface normal and contacted through both the ''buttressed'' methylthioether groups and the pyridine nitrogen atom, as determined by X-ray photoelectron spectroscopy (XPS) and shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS). Molecular junctions formed by contact of a single molecule within the film by the "STM touch-to-contact" method give a most probable molecular conductance of 4.4 x 10(-5)G(0). This value compares well with the single molecule conductance of 1, 4-bis(pyridin-4-ylethynyl)benzene determined by a variety of methods (3.2-5.4 x 10(-5)G(0)), indicating that the addition of the buttressing groups does not perturb the favourable electrical characteristics of the pyridyl contacting group. Consistent with these conductance data, a transition voltage (V-trans = 0.48 V) was observed for this ''buttressed'', pyridine-contacted OAE derivative, indicating relatively good alignment of the metal electrode Fermi level and the frontier molecular orbitals.
000152985 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E31-17R PLATON$$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2016-78257-R
000152985 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000152985 590__ $$a7.393$$b2020
000152985 591__ $$aPHYSICS, APPLIED$$b25 / 160 = 0.156$$c2020$$dQ1$$eT1
000152985 591__ $$aMATERIALS SCIENCE, MULTIDISCIPLINARY$$b65 / 333 = 0.195$$c2020$$dQ1$$eT1
000152985 592__ $$a1.899$$b2020
000152985 593__ $$aMaterials Chemistry$$c2020$$dQ1
000152985 593__ $$aChemistry (miscellaneous)$$c2020$$dQ1
000152985 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000152985 700__ $$0(orcid)0000-0002-4729-9578$$aCea, Pilar$$uUniversidad de Zaragoza
000152985 700__ $$aBock, Sören
000152985 700__ $$aMilan, David C.
000152985 700__ $$aNaghibi, Saman
000152985 700__ $$aOsorio, Henry M.
000152985 700__ $$aNichols, Richard J.
000152985 700__ $$aLow, Paul J.
000152985 700__ $$0(orcid)0000-0001-9193-3874$$aMartín, Santiago$$uUniversidad de Zaragoza
000152985 7102_ $$12012$$2755$$aUniversidad de Zaragoza$$bDpto. Química Física$$cÁrea Química Física
000152985 773__ $$g8, 2 (2020), 672-682$$pJ. mater. chem. C$$tJOURNAL OF MATERIALS CHEMISTRY C$$x2050-7526
000152985 8564_ $$s3357976$$uhttps://zaguan.unizar.es/record/152985/files/texto_completo.pdf$$yVersión publicada
000152985 8564_ $$s2742523$$uhttps://zaguan.unizar.es/record/152985/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000152985 909CO $$ooai:zaguan.unizar.es:152985$$particulos$$pdriver
000152985 951__ $$a2025-04-03-14:37:17
000152985 980__ $$aARTICLE