A Case of Self-Organization in Highly Emissive EuIII Ionic Liquids

被引：9

作者：

Leal, Joao P. ^{[1
,2
]}

Outis, Mani ^{[3
]}

Casimiro, Maria H. ^{[1
]}

Ferreira, Luis M. ^{[1
]}

Fernandes, Fabio ^{[4
,5
,6
]}

Monteiro, Bernardo ^{[1
]}

Laia, Cesar A. T. ^{[3
]}

Pereira, Claudia C. L. ^{[3
]}

机构：

[1] Univ Lisbon, Inst Super Tecn, C2TN, Campus Tecnol & Nucl,Estrada Nacl 10,Ao Km 139,7, P-2695066 Bobadela, Portugal

[2] Univ Lisbon, Ctr Quim & Bioquim, Fac Ciencias, P-1749016 Lisbon, Portugal

[3] Univ Nova Lisboa, Dept Quim, LAQV REQUIMTE, P-2829516 Monte De Caparica, Portugal

[4] Univ Lisbon, Ctr Quim Fis Mol, Inst Super Tecn, Lisbon, Portugal

[5] Univ Lisbon, Inst Nanociencia & Nanotecnol, Inst Super Tecn, Lisbon, Portugal

[6] Univ Nova Lisboa, UCIBIO, REQUIMTE, Dept Quim,FCT, Caparica, Portugal

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2017年 / 28期

关键词：

Photochemistry; Ionic liquids; Europium; Thermochemistry; Trihexyltetradecylphosphonium; CRYSTALS; EUROPIUM; COMPLEX;

D O I：

10.1002/ejic.201700649

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Intrinsic photoluminescent ionic liquids based on europium(III) tetrakis(beta-diketonate) complexes with a tetraalkyl-phosphonium as the counterion were synthesized. Two are room temperature ionic liquids; [P-6,P-6,P-6,P-14][Eu(fod)(4)] (1) {fod is 1,1,1,2,2,3,3-heptafluoro-7,7-dimethyloctane-4,6-dionate} and [P-6,P-6,P-6,P-14][Eu(fod)(3)(dbm)] (2) {dbm is dibenzoylmethanate}, while calorimetric measurements showed a melting point at 415 K for [P-6,P-6,P-6,P-14][Eu(dbm)(4)] (3). The luminescence quantum yields determined for 1, 2, and 3 are 34, 59 %, and 64 %, respectively. The photoluminescence and thermochemical properties of the complexes were investigated in detail and the influence of the long chain tetraalkylphosphonium counterion, together with the aromatic diketone ligand, on the unusual thermal behavior of 2 is discussed.

引用

页码：3429 / 3434

页数：6

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