ABSTRACT
A cyclocyanine (CC)-based organic small molecule two-photon (TP) fluorescent probe (CCNa1) was developed for mitochondrial sodium ion sensing. CCNa1 exhibits a low solvatochromic shift and strong TP fluorescence enhancement at 575 nm upon binding to Na+ and is insensitive to other metal ions and to pH. CCNa1 demonstrated fast cell loading ability, biocompatibility, and sensitive response to mitochondrial Na+ influx in live cells and mouse brain tissue.
Subject(s)
Fluorescent Dyes/chemistry , Mitochondria/chemistry , Sodium/analysis , Animals , Crown Ethers/chemistry , Crown Ethers/radiation effects , Crown Ethers/toxicity , Fluorescent Dyes/radiation effects , Fluorescent Dyes/toxicity , HeLa Cells , Heterocyclic Compounds, 4 or More Rings/chemistry , Heterocyclic Compounds, 4 or More Rings/radiation effects , Heterocyclic Compounds, 4 or More Rings/toxicity , Hippocampus/metabolism , Humans , Mice , Photons , Sodium/metabolismABSTRACT
The electron mobility and hole blocking ability of BPhen, BCP, and ET137 were investigated by fabricating an electron only device and hole only device, respectively. Although it was observed that ET137 has the highest electron mobility, the device with ET137 as electron transporting layer was unable to obtain high efficiency alone and it was necessary to use a hole blocking layer because of the poor hole blocking ability due to the high-lying HOMO energy level. We fabricated green-emitting phosphorescent devices with various hole blocking layers and electron transporting layers. It was demonstrated that the high electron mobility of the electron transporting layer and hole blocking layer leads to high efficiency in organic light-emitting diodes. The device with BPhen and ET137 as hole blocking layer and electron transporting layer, respectively, showed the best efficiency properties. The maximum values of luminous efficiency, power efficiency, and quantum efficiency were 41.1 cd/A, 26.9 Im/W and 12.4%, respectively.
ABSTRACT
The authors have demonstrated efficient green organic light-emitting diodes (OLEDs) by using polymer binder. We fabricated small molecular green OLEDs and mixed polymer as a binder such as polystyrene (PS) or poly(N-vinylcarbazole) (PVK). The 4,4'-N,N'-dicarbazole-biphenyl (CBP) is a small molecular material with excellent electrical properties however it become crystalline at high temperature. Polymer binder prevents crystallization of CBP and lead to high efficiency. Therefore, we added PS or PVK into CBP as a polymer binder. As a result, we obtained maximum luminous efficiency, power efficiency and quantum efficiency of 22.8 cd/A, 11.6 Im/W and 6.61% at 23% PS added device.
ABSTRACT
In the title compound, C(34)H(22)·2C(5)H(5)N, there is a crystallographic inversion center in the middle of the anthracene ring system. The dihedral angle between the mean planes of the anthracene and naphthalene ring systems is 83.96â (4)°. The crystal structure is stabilized by weak inter-molecular C-Hâ¯N and C-Hâ¯π inter-actions.
