000120040 001__ 120040
000120040 005__ 20240319081005.0
000120040 0247_ $$2doi$$a10.3390/nano12224026
000120040 0248_ $$2sideral$$a130953
000120040 037__ $$aART-2022-130953
000120040 041__ $$aeng
000120040 100__ $$aUlloa, José Antonio
000120040 245__ $$aGold nanoparticles modification with liquid crystalline polybenzylic dendrons via 1,3-Dipolar cycloaddition
000120040 260__ $$c2022
000120040 5060_ $$aAccess copy available to the general public$$fUnrestricted
000120040 5203_ $$aA series of six polybenzylic dendrons with an alkynyl focal point were synthesized for their incorporation to gold nanoparticles. Five of these compounds showed columnar mesomorphism in a wide range of temperatures. These dendrons were reacted with gold nanoparticles stabilized with a combination of a dodecanethiol and 11-azidoundecane-1-thiol. The azido group of the last compound allowed the functionalization of the nanoparticles with the six polybenzylic dendrons by 1,3-dipolar cycloaddition between their alkynyl groups and the terminal azido groups of the thiols. A high efficiency of the cycloaddition process (47–69%) was confirmed by several experimental techniques and no decomposition or aggregation phenomena were detected in the dendron-coated nanoparticles. The involved mechanism and the resulting percentage composition of the final materials are discussed. The results of the ulterior growth of the nanoparticles by thermal treatment are influenced by the size and the shape of the dendron and the temperature of the process. The structures of the final nanoparticles were investigated by TEM, DSC, TGA, NMR and UV-Vis spectroscopy. These nanoparticles do not show liquid crystal properties. However, a melting process between a crystalline and a fluid phase is observed. In the solid phase, the nanomaterials prepared show a short-range interaction between nanoparticles with a 2D local hexagonal order. A near-field effect was observed in the UV-vis spectra by coupling of different surface plasmon resonance bands (SPR) probably due to the short-range interactions. The main novelty of this work lies in the scarcity of previous studies of gold nanoparticles coated with dendrons forming themselves columnar mesophases. Most of the studies reported in the literature deal with gold nanoparticles coated with calamitic mesogens. Additionally, the effect of the thermal treatment, which in a previous paper was shown to increase the mean size of the nanoparticles without increasing their size polydispersity, has been studied in these materials.
000120040 536__ $$9info:eu-repo/grantAgreement/ES/DGA-FSE/E47-20R$$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/PGC2018-097583-B-I00$$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/PID2021-122882NB-I00
000120040 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000120040 590__ $$a5.3$$b2022
000120040 592__ $$a0.811$$b2022
000120040 591__ $$aPHYSICS, APPLIED$$b39 / 160 = 0.244$$c2022$$dQ1$$eT1
000120040 593__ $$aChemical Engineering (miscellaneous)$$c2022$$dQ1
000120040 591__ $$aNANOSCIENCE & NANOTECHNOLOGY$$b51 / 107 = 0.477$$c2022$$dQ2$$eT2
000120040 593__ $$aMaterials Science (miscellaneous)$$c2022$$dQ2
000120040 591__ $$aCHEMISTRY, MULTIDISCIPLINARY$$b58 / 178 = 0.326$$c2022$$dQ2$$eT1
000120040 591__ $$aMATERIALS SCIENCE, MULTIDISCIPLINARY$$b110 / 343 = 0.321$$c2022$$dQ2$$eT1
000120040 594__ $$a7.4$$b2022
000120040 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000120040 700__ $$0(orcid)0000-0001-5816-7960$$aBarberá, Joaquín$$uUniversidad de Zaragoza
000120040 700__ $$0(orcid)0000-0001-9866-6633$$aSerrano, José Luis$$uUniversidad de Zaragoza
000120040 7102_ $$12013$$2765$$aUniversidad de Zaragoza$$bDpto. Química Orgánica$$cÁrea Química Orgánica
000120040 773__ $$g12, 22 (2022), 4026 [17 pp.]$$pNanomaterials (Basel)$$tNanomaterials$$x2079-4991
000120040 8564_ $$s3148243$$uhttps://zaguan.unizar.es/record/120040/files/texto_completo.pdf$$yVersión publicada
000120040 8564_ $$s2735058$$uhttps://zaguan.unizar.es/record/120040/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000120040 909CO $$ooai:zaguan.unizar.es:120040$$particulos$$pdriver
000120040 951__ $$a2024-03-18-14:32:51
000120040 980__ $$aARTICLE