STUDIES ON HETEROMACROCYCLIC POLYETHER （XIV） THE SYNTHESIS OF SELENACROWNETHER WITH HYDROXY GROUP AND DISELENA－AZA－CROWNETHER

ＳＴＵＤＩＥＳＯＮＨＥＴＥＲＯＭＡＣＲＯＣＹＣＬＩＣＰＯＬＹＥＴＨＥＲ（ＸＩＶ）ＴＨＥＳＹＮＴＨＥＳＩＳＯＦＳＥＬＥＮＡＣＲＯＷＮＥＴＨＥＲＷＩＴＨＨＹＤＲＯＸＹＧＲＯＵＰＡＮＤＤＩＳＥＬＥＮＡ－ＡＺＡ－ＣＲＯＷＮＥＴＨＥＲＨａｎＳｈｅｎｇＸｕ；Ｊｕ...     

FLUORESCENCE SPECTROSCOPY STUDIES ON THE ACTION OF RARE BARTHS WITH BOVINE SERUM BOVINE SERUM ALBUNI

ＦＬＵＯＲＥＳＣＥＮＣＥＳＰＥＣＴＲＯＳＣＯＰＹＳＴＵＤＩＥＳＯＮＴＨＥＡＣＴＩＯＮＯＦＲＡＲＥＢＡＲＴＨＳＷＩＴＨＢＯＶＩＮＥＳＥＲＵＭＢＯＶＩＮＥＳＥＲＵＭＡＬＢＵＮＩＩＮＩＮＭＵＬＴＩＭＯＬＥＣＵＬＡＲＳＹＳＴＥＭ￥ＺＨｉＱｉａｎｇＷＡＮＧ；Ｓ...     

PRELIMINARY STUDIES ON THE IMMUNOCHEMICAL BEHAVIOR OF BSA-TTA-Eu CONJUGATES

ＰＲＥＬＩＭＩＮＡＲＹ　ＳＴＵＤＩＥＳ　ＯＮ　ＴＨＥ　ＩＭＭＵＮＯＣＨＥＭＩＣＡＬ　ＢＥＨＡＶＩＯＲ　ＯＦ　ＢＳＡ－ＴＴＡ－Ｅｕ　ＣＯＮＪＵＧＡＴＥＳＰＲＥＬＩＭＩＮＡＲＹＳＴＵＤＩＥＳＯＮＴＨＥＩＭＭＵＮＯＣＨＥＭＩＣＡＬＢＥＨＡＶＩＯＲＯＦＢＳＡ...     

EFFECTS OF SUBSTITUENTS IN ETHENYL ANILINE DERIVATIVE WITH DONOR AND ACCEPTOR GROUP ON PHOTOVOLTAIC BEHAVIOR

ＥＦＦＥＣＴＳ ＯＦ ＳＵＢＳＴＩＴＵＥＮＴＳ ＩＮ ＥＴＨＥＮＹＬ ＡＮＩＬＩＮＥ ＤＥＲＩＶＡＴＩＶＥ ＷＩＴＨ ＤＯＮＯＲ ＡＮＤ ＡＣＣＥＰＴＯＲ ＧＲＯＵＰ ＯＮ ＰＨＯＴＯＶＯＬＴＡＩＣ ＢＥＨＡＶＩＯＲ￥ＢａｃＨｕｉＷＡＮＧ；ＤｅＪｕｎ...     

STUDIES ON FLUORESCENCE SPECTRA OF SAMARIUM EUROPIUM TERBIUM AND DYSPROSIUM WITH BENZOYL UREA DERIVATIVES AND PHENANTHROLINE

Rare earth chelates of benzoyl urea derivatives were prepared in ethanol and fluorescence spectra of these chelates were studied in detail. A composition of [RE(BU)_3Phen] (NO_3)_3 was obtained. Correlation between chemical properties of ligands, chelates and spectroscopy was discussed. Intramolecular energy transfer in rare earth chelates was explained.     

STERIC EFFECT OF HYDROXY GROUPS ORTHO TO THE AZO－GROUP ON ANALYTICAL BEHAVIOR OF CHROMOGENIC REAGENTS

ＳＴＥＲＩＣＥＦＦＥＣＴＯＦＨＹＤＲＯＸＹＧＲＯＵＰＳＯＲＴＨＯＴＯＴＨＥＡＺＯ－ＧＲＯＵＰＯＮＡＮＡＬＹＴＩＣＡＬＢＥＨＡＶＩＯＲＯＦＣＨＲＯＭＯＧＥＮＩＣＲＥＡＧＥＮＴＳ￥ＨｕｉＭｉｎＭＡ；ＹｕｅＸｉａｎＨＵＡＮＧａｎｄＳｈｕＱｕａｎＬｉＡＮＧ（...     

STUDIES ON THE EXCIMER FLUORESCENCE AND THE STERIC TACTICITY OF POLYPHENYLSILSESQUIOXANES

The steric tacticity of polyphenylsilsesquioxanes (PPS) was studied by exeimer fluorescence spectroscopy. It was found that the fluorescence of PPS come mainly from its intramolecular excimers, The experimental results indicated that the steric-structure of PPS is most probably cisisotactic rather than the cis-syndiotactic as suggested in the literature. With the increase in defect content monomer fluorescence intensity increases because of the enhanced mobility of phenyl groups. Molecular weights and molecular weight distributions do not affect the fluorescence spectra of PPS.     

STUDIES ON THE INTERACTION OF EPOXY POLYMERS WITH HOMOPOLYUREAS

INTRODUCTION Epoxy resins are reactive polymers which when cured with a variety of chemicals lead to a host of useful thermosets. Since the epoxide is a strained ring, it readily undergoes addition and homopolymerization. The homopolymerization is a process catalysed by acids, bases, Lewis acids, t-amines as well as by inorganic salts.     

STUDIES ON STRUCTURES OF SOME PLATINUM COMPLEXES WITH 1, 1-CYCLOPROPANEDICAR BOXYLATE

The crystal structure, of [Pt(NH_3)_2CPrDCA]. H_2O (Ⅰ), [Pt(CH_3NH_2)_2CPrDCA] (Ⅱ), and [Pt(dmbn) CPrDCA]·2.5H_2O(Ⅲ) (where CPrDCA is 1, 1-cyclopropanedicarboxylate; dmbn is 2, 3-dimethyl-2, 3-butyldiamine) are determined. Compound Ⅰ crystallizes in the orthorhombic space group P_(nma) with the cell dimensions: a=6.517(2), b=9.709(3), c=14.205(5), Z=4, R=0.058. Compound Ⅱ is monoclinic with space group P2_1/n, a=9.648(3), b=8.720(2), c=12.770(4), β=107.12(2), Z=4, R=0.059. Compound Ⅲ belongs to the monoclinic system space group P2_1/m with the cell dimensions: a=6.494(1), b=19.638(3), c=6.606(1), β=94.44(1), Z=2, R=0.038.Electronic structures of the complexes are studied and the correlstion between structure of the amine ligands and biological activity of the complexes is explored.     

THE EFFECT OF IRRADIATION ON THE POLYETHERKETONE WITH CARDO GROUP

The effects of irradiation on the polyetherketone with cardo group (PEK-C) were studied. It was found that PEK-C can be crosslinked by irradiation under vacuum, while degradation reaction occurred in PEK-C at room temperature in the presence of air. Moreover. it was also found that Ts value of the crosslinked PEK-C at high temperature is higher than that at room temperature in the case of the same gel content, whose value is about 8℃higher than that of unirradiated PEK-C. The gelation dose of PEK-C at 300℃under vacuum is 1.5×10~4 Gy, which is about hundred times smaller than that at room temperature.     

STUDIES ON THE MECHANICAL PROPERTIES AND CRYSTALLIZATION BEHAVIOR OF POLYETHYLENE COMPOSITES

The effects of inter facial modifier on the mechanical, dynamic mechanical properties andcrystallization behavior of the polyethylene composites were investigated in the present paper.It was found that the interfacial modifer significantly improved the mechanical properties,influenced the dynamic mechanical spectra and slightly changed the crystallization behavior.The results showed that the interfacial modifier changed the dispersion state of dispersedphase of the composites, resulting in different phase structure, which was the major reasonIeading to different mechanical and crystallization properties.     

STUDIES ON THE SYNTHESIS AND REACTIONWITH ALKOXIDES OF 3－OXO－1，2－BENZOISOTHIAZOLINE－2－ACETAMIDE1，1－DIOXIDES

ＳＴＵＤＩＥＳＯＮＴＨＥＳＹＮＴＨＥＳＩＳＡＮＤＲＥＡＣＴＩＯＮＷＩＴＨＡＬＫＯＸＩＤＥＳＯＦ３－ＯＸＯ－１，２－ＢＥＮＺＯＩＳＯＴＨＩＡＺＯＬＩＮＥ－２－ＡＣＥＴＡＭＩＤＥ１，１－ＤＩＯＸＩＤＥＳＧｕｏＦｅｎｇＺＨＡＯ；ＨｕａＺｂｅｎｇＹＡＮＧ（Ｉ...     

STUDIES ON FLUORESCENCE ENHANCING EFFECT AND ALKALINE DEGRADATION MECHANISM OF DOXYCYCLINE AND METHACYCLINE

Degradation reaction of doxycycline or methacycline was carried outin KOH solution and intense fluorescence was obtained.A degradationmechanism of doxycycline or methacycline was suggested.     

STUDIES ON THE SYNTHESIS OF SESAMIN－GROUP LIGNANS V． A CONVENIENT METHOD FOR THE PREPARATION OF 2－ARYL－4－PHENYLOXAZOLES

ＳＴＵＤＩＥＳＯＮＴＨＥＳＹＮＴＨＥＳＩＳＯＦＳＥＳＡＭＩＮ－ＧＲＯＵＰＬＩＧＮＡＮＳＶ．ＡＣＯＮＶＥＮＩＥＮＴＭＥＴＨＯＤＦＯＲＴＨＥＰＲＥＰＡＲＡＴＩＯＮＯＦ２－ＡＲＹＬ－４－ＰＨＥＮＹＬＯＸＡＺＯＬＥＳ￥Ｃｏｒｒｅｓｐｏｎｄｅｎｔａｕｔｈｏｒ．２－ａｒｙｌ－４－ｐｈｅｎｙｌｏｘａｚｏｌｅｓ．Ｔｈｅｏｔｈｅｒｏｌｌｅｂｙｔｈｅｒｅａｃｔｉｏｎｏｆａ－ｍｅｔｈｙｌｐｈｅｎａｃｙｌｂｅｎｚｏａｔｅｗｉｔｈａｍｍｏｎｉｕｍａｃｅｔａｔｅｉｎｂｏｉｌｉｎｇａｃｅｔｉｃａｃｉｄｔｏｆｏｒｍａｆｕｔｕｒｅｏｆ２，４－ｄｉｐｈｅｎｙｌ－５ｍｅｔｈｙｌｏｘａｚｏｌｅａｎｄ２，４－ｄｉｐｈｅｎｙｌ－５－ｒｎｅｔｈｙｌｉｎｄｄａｚｏｌｅｂｏｔｈｉｎａｂｏｕｔ４０％ｙｉｅｌｄ，ｈｉｌｔｔｉｌｌｓｍｅｔｈｏｄｉｓａｐｐｌｉｃａｂｌｅｆｏｒｔｈｅｐｒｅｐａｒａｔｉｏｎｏｆ２－ａｒｙｌ－４－ｐｈｅｎｙｌｏｘａｚｏｌｅｓ．Ｂｙａｎａｌｏｇｙ，ｐｌｉｅｎａｃｙｌｂｅｎｚｏａｔｅｉｓａｌｌｏａｌｌｏｗｅｄｔｏｒｅａｃｔｗｉｔｈａｌｎｍｏｎｉｌｌｍａｃｅｔａｔｅｉｎｂｏｉｌｉｎｇａｃｅｔｉｃａｃｉｄ．Ａｍｉｘｔｕｒｅｏｆ２，４－ｄｉｐｈ     

THEORETICAL STUDIES ON THE CYCLOADDITION REACTION OF FLUOROKETENE WITH ETHYLIDENIMINE

ＴＨＥＯＲＥＴＩＣＡＬＳＴＵＤＩＥＳＯＮＴＨＥＣＹＣＬＯＡＤＤＩＴＩＯＮＲＥＡＣＴＩＯＮＯＦＦＬＵＯＲＯＫＥＴＥＮＥＷＩＴＨＥＴＨＹＬＩＤＥＮＩＭＩＮＥＴＨＥＯＲＥＴＩＣＡＬＳＴＵＤＩＥＳＯＮＴＨＥＣＹＣＬＯＡＤＤＩＴＩＯＮＲＥＡＣＴＩＯＮＯＦＦＬＵ...     

STUDIES ON STRUCTURE AND PHASE BEHAVIOR OF MULTICOMPONENT POLYMERS THROUGH RHEOLOGICAL TESTS

Rheological measurement has been a preferred approach to the characterization of the structure and phase behaviors for multi-component/multi-phase polymer systems, due to its sensitive response to the changes of structure for these heterogeneous polymers. In the present article, recent progresses in the studies on rheology for heterogeneous polymer systems including phase-separated polymeric blends and block copolymers are reviewed, mainly depending on the results by the authors＇ research group. By means of rheological measurements, not only some new fingerprints responsible for the evolution of morphology and structure concerning these polymer systems are obtained, also the corresponding results are significant for design and preparation of novel polymeric structural materials and functional materials.     

STUDIES ON COMBUSTION BEHAVIOR OF NR/MMT NANO-COMPOSITES BY CONE CALORIMETER

The NR/modified montmorillonite(EMT)nano-composites were prepared by mechanical mixing and reacting in situ with glycidyl methacrylate.Under 30 kW.m~(-2)of heat flux,the combustion behavior of the nano-composites was studied with cone calorimetry,and PHRR,THR,EHC,TSR and MLR were tested.The results showed that the nano- composite had improved mechanical properties and flame retardance properties,and to some extent,the nano-composite had smoke suppress effect.Compared with pure NR,the PHRR,EHC and SPR of the nano-composite reduced by 34%,21% and 16.8%,respectively.     

STUDIES ON THE EXCIMER FLUORESCENCE OF POLYPHENYL GLYCIDYL ETHER AND POLYNAPHTHYL GLYCIDYL ETHER

Polyphenyl glycidyl ether (PPGE) and polynaphthyl glycidyl ether (PNGE) have beensynthesized by cationic polymerization and their structures characterized by carbon 13 NMRand 1R, etc. The fluorescence spectra of PPGE, PNGE and their corresponding monomersPGE, NGE as model compounds have been studied. In dilute solutions at room temperature,only monomer fluorescence of the chromophore is observed. Comparison between the spectraobtained from dilute solutions, concentrated solutions and solid film shows that there is excimeremission when polymer chains in solution or in film are sufficiently close to each ocher.From the concentration dependence of the excimer emission, further evidence is obtained forthe existence of interchain excimer interaction in these polymers.     

FLUORESCENCE STUDIES ON MORPHOLOGICAL CHANGE OF ST/DVB CROSSLINKED GELS DURING CHLOROMETHYLATION

1. INTRODUCTION Crosslinked polymer gels have solid-liquid dual performance, which play an important role in modern high technology [1]. A wide variety of functional and intelligent materials can be prepared via chemical modification of crosslinked polym…     

STUDY ON THE REARRANGEMENT REACTION OF 5－AMINO－1－AMINOCARBONYL－1，2，AND ITS ANALOGUES

ＳＴＵＤＹＯＮＴＨＥＲＥＡＲＲＡＮＧＥＭＥＮＴＲＥＡＣＴＩＯＮＯＦ５－ＡＭＩＮＯ－１－ＡＭＩＮＯＣＡＲＢＯＮＹＬ－１，２，ＡＮＤＩＴＳＡＮＡＬＯＧＵＥＳ￥ＲｏｎｇＪｉａｎＬＵ；ＨｕａＺｈｅｎｇＹＡＮＧ；ＢａｏＹｉｎｇＱＩＡＮ；ＨａｉＹａｎＤＥＮＧ（Ｎ...