Characterization of isomers in aluminum tris(quinoline-8-olate) by one-dimensional 27Al nuclear magnetic resonance under magic-angle spinning

Abstract

Articles you may be interested inTheory for cross effect dynamic nuclear polarization under magic-angle spinning in solid state nuclear magnetic resonance: The importance of level crossings J. Chem. Phys. 137, 084508 (2012); 10.1063/1.4747449Internal symmetry of basic elements in symmetry-based recoupling sequences under magic-angle spinning

Delayed fluorescence and phosphorescence of tris-(8-hydroxyquinoline)aluminum (Alq3) and their temperature dependence

“…It has been mainly used as an emitting layer, an electron-transport layer or as a host for red fluorescent triplet emitters [1][2][3]. Much work has been done on its role in OLEDs, the properties of its amorphous films [4,5] and polycrystalline phases [6][7][8][9][10][11][12] as well as its properties in the electronic ground and excited states [1,13,14]. Four crystalline phases (a, b, g, d) have been characterized so far, and the dphase was identified as consisting of the facial isomer [6][7][8][9][10][11][12][15][16][17][18].…”

Effects of nanocrystals on evolution behavior of shear transformation zones in Zr85Cu15 metallic glasses

“…The location of the circles in Fig. 2(a) and (b) demonstrates that the sites have similar structural origins, namely, heterogeneous defects, i.e., liquid-like zones [19][20][21][22][23]. The crystallized sites during annealing at 950 K are structurally and energetically unfavorable for deformation.…”

“…Metastable MGs can form an ordered crystalline phase when atoms in the liquid-like zones are activated through annealing at high temperatures or relaxing under ultrasonic vibration [14,18]. These liquid-like zones are the preferred activation sites of atomic cluster motions caused by applied stress or high temperatures [19][20][21][22][23]. Despite various studies performed, the effect of the crystal phase induced by temperature or ultrasonic vibration on the formation and activation sites of STZs remains unclear and no consensus has been attained.…”

The origin of luminescence blueshifts in Alq3 composites

“…d crystalline phase, can be produced in a consistent amount in films by evaporation techniques, both for opposite results already obtained on films [9,12,13], and by the fact that the d phase is usually produced by heating Alq 3 powder at temperatures higher than 380 1C [4].…”