The Molecular Structures and Properties of Novel Eu(III) Complexes with Asymmetric Bis-phosphine Oxides

2006 ◽  
Vol 965 ◽  
Author(s):  
Hiroki Iwanaga ◽  
Fumihiko Aiga ◽  
Akio Amano
Keyword(s):  
Thermal Properties ◽  
Phosphine Oxide ◽  
Fluorescence Intensity ◽  
Alkyl Chain ◽  
Silicone Oil ◽  
Molecular Structures ◽  
Phosphine Oxides ◽  
Structures And Properties

ABSTRACTSeveral novel Eu(III) complexes with asymmetric bis-phosphine oxide- ligands were synthesized. The relation between molecular structures of bis-phosphine- oxide ligands and properties of Eu(III) complexes was investigated and some interesting results were obtained. Solubility of Eu(III) complexes in fluorinated medium and silicone oil were strongly dependent on the length of alkyl chain (n) binding two phosphine oxide- parts. Also, the thermal properties of Eu(III) complexes were correlated to the solubility. Eu(III) complex 6(n=3), which has phenyl and n-octyl groups as the substituents of a bis-phosphine oxide- ligand, was found to be highly soluble and have large fluorescence intensity.

Bright photo- and triboluminescence of centrosymmetric Eu(III) and Tb(III) complexes with phosphine oxides containing azaheterocycles

2021 ◽  
Author(s):  
Yuliya Bryleva ◽  
Alexander Artem'ev ◽  
Ludmila Alexsandrovna Glinskaya ◽  
Marianna I Rakhmanova ◽  
Denis G. Samsonenko ◽  
...  
Keyword(s):  
Phosphine Oxide ◽  
Phosphine Oxides

Six centrosymmetric mononuclear Eu3+ and Tb3+ complexes of the type [LnL2(hfac)3] have been synthesized employing diphenyl(pyridin-2-yl)phosphine oxide (Ph2P(O)Py), diphenyl(pyridimin-2-yl)phosphine oxide (Ph2P(O)Pym), and diphenyl(pyrazin-2-yl)phosphine oxide (Ph2P(O)Pyr) as supporting ligands (L). The...

Thermal stability of primary and secondary phosphine oxides formed as a reaction of phosphine oxide with ketones

2016 ◽  
Vol 191 (11-12) ◽  
pp. 1480-1481 ◽  
Author(s):  
E. V. Gorbachuk ◽  
E. K. Badeeva ◽  
S. A. Katsyuba ◽  
P. O. Pavlov ◽  
Kh. R. Khayarov ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Phosphine Oxide ◽  
Secondary Phosphine ◽  
Phosphine Oxides ◽  
Thermal Stability Of

scholarly journals Comparison of Thermal Properties of PCB Photoresist Films Cured by Different Techniques

2016 ◽  
Vol 15 (2) ◽  
pp. 20
Author(s):  
Piyachat Wattanachai ◽  
Christian Antonio ◽  
Susan Roces
Keyword(s):  
Thermal Properties ◽  
Printed Circuit Boards ◽  
Molecular Structures ◽  
Limiting Factor ◽  
Circuit Boards ◽  
Microwave Technology ◽  
Hot Plate ◽  
Degradation Temperature ◽  
Strong Material ◽  
Curing Method

The possibility of implementing microwave technology to photoresist film curing which is a major process in the production of electronic printed circuit boards (PCB) was investigated and compared with a conventional curing method, e.g. UV lithography. Since both techniques involved irradiation, hot plate curing which relies on thermal conduction was undertaken to study the effect of a heat transfer approach. Two film thicknesses were studied, i.e. 0.0012 and 0.002 inch, and the effects of curing power and time were investigated. Thermal properties, i.e. percent cure, glass transition temperature (Tg), composition and degradation temperature (Td), were evaluated using a Differential Scanning Calorimeter (DSC) and Thermogravimetric Analysis (TGA) and it was found that the commercial UV irradiation was sufficient to completely cure the thin film but only reached 76% cure for the thicker film, resulting in a lower Tg. The results show that the required processing conditions using a conventional household microwave to obtain almost complete curing were 1,000 Watts and 10 minutes curing time. In addition, improved curing was achieved in the thicker film because microwave can transmit into polar materials whereas UV cannot penetrate very far into the material. The hot plate curing was observed to produce a higher degree of curing and Tg, however, the uniformity of heating was found to be a major limiting factor of this technique. Slight differences in decomposition profiles of the films cured by different techniques implied slight differences in molecular structures. Compared to UV and hot plate curing, microwave technology was demonstrated as a potential curing technique in the production of PCBs due to its ability to efficiently cure thick films resulting in a strong material with high Tg. To apply the technique to other processes, optimal conditions, i.e. power and time, should be further investigated as well as the prevention of hot spots.

Research on Some Novel Functional Azobenzene Derivatives with Alkyl Chains and Different Substituted Groups

2011 ◽  
Vol 474-476 ◽  
pp. 537-542
Author(s):  
Ti Feng Jiao ◽  
Xu Hui Li ◽  
Jing Xin Zhou ◽  
Yuan Yuan Xing ◽  
Jing Ren
Keyword(s):  
Alkyl Chain ◽  
Uv Light ◽  
Molecular Structures ◽  
Functional Material ◽  
Alkyl Chains ◽  
Temperature Ranges ◽  
The Difference ◽  
Structural Influence ◽  
Azobenzene Derivatives ◽  
Base Group

Two functional azobenzene derivatives with alkyl chains and different substituted groups have been synthesized and their photoisomerization have also been investigated. It has been found that depending on the alkyl chain and different substituted groups, the formed azobenzene derivatives showed different properties, indicating distinct regulation of molecular skeletons. UV and IR data confirmed commonly the characteristic absorption of alkyl chain and aromatic segments in molecular structures. Thermal analysis demonstrated that the structural influence of both compounds in different temperature ranges. The difference of thermal stability is mainly attributed to the formation of Schiff base group and different substituent groups in molecular structure. The photoisomerization of these compounds both in solution and in cast film can undergo trans-to-cis isomerization by UV light irradiation, depending on different substituted groups. The present results have demonstrated that the special properties of azobenzene derivatives can be effectively turned by modifying molecular structures of objective compounds with proper substituted groups, which show potential application in functional material field.

Preparation of Optically Pure Tertiary Phosphine Oxides via the Addition ofP-Stereogenic Secondary Phosphine Oxide to Activated Alkenes

2016 ◽  
Vol 81 (17) ◽  
pp. 7644-7653 ◽  
Author(s):  
Ji-Ping Wang ◽  
Shao-Zhen Nie ◽  
Zhong-Yang Zhou ◽  
Jing-Jing Ye ◽  
Jing-Hong Wen ◽  
...  
Keyword(s):  
Phosphine Oxide ◽  
Secondary Phosphine ◽  
Phosphine Oxides ◽  
Tertiary Phosphine ◽  
Optically Pure

A Deep Blue Organic Light Emitting Diodes Characteristic of Isomerically-Featured Phosphine Oxides Containing N-Phenyl Benzimidazole

2020 ◽  
Vol 20 (8) ◽  
pp. 4657-4660
Author(s):  
Kyeong Hyeon Kim ◽  
Jae Hyeok Lee ◽  
Dong-Eun Kim ◽  
Hoon-Kyu Shin ◽  
Burm-Jong Lee
Keyword(s):  
Differential Scanning Calorimetry ◽  
Thermal Properties ◽  
Thermogravimetric Analysis ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Phosphine Oxides ◽  
Scanning Calorimetry ◽  
Light Emitting ◽  
Deep Blue ◽  
Organic Light

An isomeric series of phosphine oxides with N-phenyl benzimidazole such as 2-DPPI, 3-DPPI and 4-DPPI were synthesized for organic light emitting diodes (OLED). The thermal properties of DPPI isomers were determined by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). OLED devices using DPPI isomers as the emitting material were fabricated, which configuration was ITO/MoOx [30 nm]/NPB [500 nm]/DPPI [300 nm]/Alq3 [200 nm]/Liq[10 nm]/Al [120 nm]. The emitting colors of the devices were respectively a deep-blue (430 nm, 4-DPPI) and greenish-yellows (510–580 nm, 3-DPPI and 530 nm, 2-DPPI). In particular, the emitting color of 4-DPPI device was not changed during the alteration of applied voltages (6.5–11.5 V), and the CIE coordinate was a satisfactory deep-blue (0.161, 0.101).

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