TY - JOUR
T1 - A luminescent europium ionic liquid to improve the performance of chitosan polymer electrolytes
AU - Leones, Rita
AU - Reis, P. M.
AU - Sabadini, Rodrigo C.
AU - Ravaro, Leandro Piaggi
AU - Silva, Igor D′Anciães A. A.
AU - de Camargo, A. S. S.
AU - Donoso, J. P.
AU - Magon, C. J.
AU - Esperança, J. M. S. S.
AU - Pawlicka, Agnieszka J.
AU - Silva, M. M.
N1 - This work was supported by Fundacao para a Ciencia e a Tecnologia (FCT) in the framework of the Research unit GREEN-it "Bioresources for Sustainability" (UID/Multi/04551/2013), Laboratorio Associado para a Quimica Verde - Tecnologias e Processos Limpos-LAQV (UID/QUI/50006/2013), and UID/QUI/00686/2013 and UID/QUI/0686/2016. Grants SRFH/BD/90366/2012 (R.L.), SRFH/BPD/109597/2015 (P.M.R.) and a contract under Investigador FCT 2012 program (J.M.S.S.E.). It was also co-financed by FEDER through the COMPETE Program and PT2020 Partnership Agreement (POCI-01-0145-FEDER-007265). A.S.S.C. and L.P.R. acknowledge the Brazilian funding agency FAPESP for a research grant (Cepid 2013/07793-6) and a postdoctoral fellowship (2013/247277). M.M.S., A.P., and R.C.S. acknowledge CNPq for grants 406617/2013-9, 305029/2013-4, and 152252/2016-9, respectively. The financial support of the Brazilian agencies Capes and CNPq are gratefully acknowledged. Research was partially financed by the CeRTEV, Center for Research, Technology and Education in Vitreous Materials, FAPESP 2013/07793-6.
PY - 2017/6/20
Y1 - 2017/6/20
N2 - Ionically conductive and luminescent chitosan solid polymer electrolytes (SPEs) were prepared through the solvent casting method and characterized with respect to their thermal behavior, morphology, structure, ionic conductivity, optical, and photophysical properties. The characterization was performed by analysis of differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), atomic force microscopy (AFM), complex impedance and photoluminescence spectroscopies. The chitosan-SPEs were doped with different quantities of 1-ehtyl-3-methylimidazolium europium(III) tetrathiocyanate ([C2mim][Eu(SCN)4]). The chitosann[C2mim][[Eu(SCN)4] membranes exhibited a semi-crystalline morphology and good thermal stability (Tonset ≈ 134 °C). The sample with the highest ionic conductivity was the chitosan4[C2mim][Eu(SCN)4] with 1.34 × 10−5 and 1.97 × 10−4 S.cm−1 at 30 and 80 °C, respectively. The photoluminescence analysis showed intense red emission corresponding to the 5D0 → 7D2 transition, as it is typical for Eu3+ luminescent materials. The chitosan0.5[C2mim][Eu(SCN)4] sample emitted red luminescence with a lifetime of 0.397 ms. The chitosan1[C2mim][Eu(SCN)4] exhibited the best equilibrium between the membrane's optical and photophysical features. These results encourage future investigations of these materials for application in electroluminescent devices.
AB - Ionically conductive and luminescent chitosan solid polymer electrolytes (SPEs) were prepared through the solvent casting method and characterized with respect to their thermal behavior, morphology, structure, ionic conductivity, optical, and photophysical properties. The characterization was performed by analysis of differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), atomic force microscopy (AFM), complex impedance and photoluminescence spectroscopies. The chitosan-SPEs were doped with different quantities of 1-ehtyl-3-methylimidazolium europium(III) tetrathiocyanate ([C2mim][Eu(SCN)4]). The chitosann[C2mim][[Eu(SCN)4] membranes exhibited a semi-crystalline morphology and good thermal stability (Tonset ≈ 134 °C). The sample with the highest ionic conductivity was the chitosan4[C2mim][Eu(SCN)4] with 1.34 × 10−5 and 1.97 × 10−4 S.cm−1 at 30 and 80 °C, respectively. The photoluminescence analysis showed intense red emission corresponding to the 5D0 → 7D2 transition, as it is typical for Eu3+ luminescent materials. The chitosan0.5[C2mim][Eu(SCN)4] sample emitted red luminescence with a lifetime of 0.397 ms. The chitosan1[C2mim][Eu(SCN)4] exhibited the best equilibrium between the membrane's optical and photophysical features. These results encourage future investigations of these materials for application in electroluminescent devices.
KW - Europium(III)
KW - ionic liquid
KW - luminescent materials
KW - photoluminescence spectroscopy
KW - solid polymer electrolytes
UR - http://www.scopus.com/inward/record.url?scp=85018785397&partnerID=8YFLogxK
U2 - 10.1016/j.electacta.2017.04.042
DO - 10.1016/j.electacta.2017.04.042
M3 - Article
AN - SCOPUS:85018785397
SN - 0013-4686
VL - 240
SP - 474
EP - 485
JO - Electrochimica Acta
JF - Electrochimica Acta
ER -