TERNARY COMPLEXES OF Cu(ATP)AND HETEROAROMATIC N BASE-ISOQUINOLINE AND BENZIMIDAZOLE:STABILITY CONSTANT AND STACKING EFFECT

The stability constants of the binary complexes ofCu~(2+) with isoquinoline and benzimidazole as well as the ternarycomplexes of Cu(ATP)with the same ligands have been measuredin aqueous solution spectrophotometrically and a strongstacking interaction between the heteroaromatic ring of theligands and the purine moiety of ATP has been found.The factof this stacking interaction is much stronger than that in thesystems of Cu(ATP)with pyridine and imidazole shows thatthe stacking interaction increases with the size of theheteroaromatic ring of the ligands.     

TERNARY Cu(Ⅱ)(ATP)AND HETEROAROMATIC N BASE COMPLEXES IN SOLUTION:STABILITY CONSTANTS AND ANTITUMOR MECHANISM EXPLORATION

The stability of the complexes of four pyridine-like ligandswith Cu(ATP)~(2-) was studied and by comparing the stability constants of theternary complexes[Cu(ATP)L]~(2-) with those of the binary complexes[CuL]~(2+),astacking interaction between the pyridine ring and the purine ring of ATP isindicated.It is possible to interpret the antitumor mechanism of[Pt(NH_3)_8(N-het)Cl]Cl in terms of this stacking interaction.     

TERNARY METALLIC NUCLEOTIDE COMPLEXES WITH POLYPYRIDYL IN SOLUTION：INFLUENCE OF SOLVENT POLARITY ON THE INTRAMOLECULAR STACKING INTERACTION IN THE TERNARY COMPLEX Cu（pdphen）（ATP）￣（2－）

ＴＥＲＮＡＲＹ　ＭＥＴＡＬＬＩＣ　ＮＵＣＬＥＯＴＩＤＥ　ＣＯＭＰＬＥＸＥＳ　ＷＩＴＨ　ＰＯＬＹＰＹＲＩＤＹＬ　ＩＮ　ＳＯＬＵＴＩＯＮ：ＩＮＦＬＵＥＮＣＥ　ＯＦ　ＳＯＬＶＥＮＴ　ＰＯＬＡＲＩＴＹ　ＯＮ　ＴＨＥ　ＩＮＴＲＡＭＯＬＥＣＵＬＡＲ　ＳＴＡＣＫＩ...     

1~HNMR STUDY OF INTRAMOLECULAR STACKING IN TERNARY PALLADIUM（Ⅱ） COMPLEXES INVOLVING ADENOSLNE 5＇－TRIPHOSPHATE AND LIGANDS CONTAINING OXYGEN AND／OR NITROGEN AS DONOR ATOMS

１￣ＨＮＭＲＳＴＵＤＹＯＦＩＮＴＲＡＭＯＬＥＣＵＬＡＲＳＴＡＣＫＩＮＧＩＮＴＥＲＮＡＲＹＰＡＬＬＡＤＩＵＭ（Ⅱ）ＣＯＭＰＬＥＸＥＳＩＮＶＯＬＶＩＮＧＡＤＥＮＯＳＬＮＥ５＇－ＴＲＩＰＨＯＳＰＨＡＴＥＡＮＤＬＩＧＡＮＤＳＣＯＮＴＡＩＮＩＮＧＯＸＹＧＥＮＡ...     

THE STACKING INERACTION OF TERNARY COMPLEXES OF Zn(ATP)~(2-)AND PYRIDINE-LIKELIGANDS

ＴＨＥ　ＳＴＡＣＫＩＮＧ　ＩＮＥＲＡＣＴＩＯＮ　ＯＦ　ＴＥＲＮＡＲＹ　ＣＯＭＰＬＥＸＥＳ　ＯＦ　Ｚｎ（ＡＴＰ）~（２－）ＡＮＤ　ＰＹＲＩＤＩＮＥ－ＬＩＫＥＬＩＧＡＮＤＳＴＨＥＳＴＡＣＫＩＮＧＩＮＴＥＲＡＣＴＩＯＮＯＦＴＥＲＮＡＲＹＣＯＭＰＬＥＸＥＳＯ?..     

THE IONIZATION OF EXCIPLEXES FORMED BY CYANO-CONTAINING OLEFINIC COMPOUNDS AND N,N-DIMETHYL-p-TOLUIDINE

The absorption spectra, fluorescence spectra and photoconduction of some systems com-posed of different cyano-containing olefinic compounds and N, N-dimethyl-p-toluidine (DMT)have been studied in this paper. The experimental results show that the exciplex emissionspectra can be observed when the systems of acrylonitrile (AN) or methacrylonitrile (MAN)with DMT are illuminated, whereas the exciplexes between trans-1, 2,-dicyanocthylene(DCNE) or tetracyanoethylene (TONE) with DMT could not be found from the spectra dueto their large ionization. The measurements of photoconduction provide further a clear andunambiguous evidence for the ionization of the systems mentioned above, and they are thesupplement to the systems studied here.     

TERNARY COMPLEXES OF Cu （ATP） AND NUCLEIC ACID BASEADENINE AND GUANINE STABILITY CONSTANTS AND STACKING EFFECT

ＴＥＲＮＡＲＹＣＯＭＰＬＥＸＥＳＯＦＣｕ（ＡＴＰ）ＡＮＤＮＵＣＬＥＩＣＡＣＩＤＢＡＳＥＡＤＥＮＩＮＥＡＮＤＧＵＡＮＩＮＥＳＴＡＢＩＬＩＴＹＣＯＮＳＴＡＮＴＳＡＮＤＳＴＡＣＫＩＮＧＥＦＦＥＣＴ￥ＦｕＨａｉＷＵ；ＸｕｅＹｉＬＥ；ＦｅｎＹｕｎＳＯＮＧ；Ｂｉ...     

THE INTRAMOLECULAR AROMATIC-RING STACKING INTERACTION OF MIXED LIGAND PALLADIUM(Ⅱ)COMPLEXES Ⅲ.STUDIES ON THE Pd~(2+)-A-UTP~(4-)SYSTEMS BY HNMR

The intramolecular aromatic-ring stacking interaction of mixed-ligand complex Pd(A)(UTP)~(2-)in the system pd~(2+)-A-UTP~(4-)has been determinedby ~1HNMR,where A=1,10-phenanthroline(phen),2,2'-bipyridyl(bpy)and DL-tryptophan(trp~-);UTP~(4-)=uridine 5-triphosphate.The result indicates that itis the partial stacking between the uracil ring of UTP~(4-)and the heterocyclicring of A that makes H(5),H(6)and H(1')in the UTP~(4-)shift upfield signifi-cantly.Accordingly,the order of aromatic-ring interaction in the mixed-ligand complex has been obtained as follows:Pd(phen)(UTP)~(2-)(?)Pd(bpy)(UTP)~(2-)Pd(trp)(UTP)~(3-).     

REACTIONS IN MICROEMULSION FORMED BY ANIONIC－NONIONIC MIXED SURFACTANT，WATER AND HEPTANE

ＲＥＡＣＴＩＯＮＳＩＮＭＩＣＲＯＥＭＵＬＳＩＯＮＦＯＲＭＥＤＢＹＡＮＩＯＮＩＣ－ＮＯＮＩＯＮＩＣＭＩＸＥＤＳＵＲＦＡＣＴＡＮＴ，ＷＡＴＥＲＡＮＤＨＥＰＴＡＮＥＪｉＭｉｎｇＭＡ；ＨｕＭｉｎＣＨＥＮＧ；ＺｈｅｎＧｕｏＺＨＡＯａｎｄＬｉＭｉｎＱＩＤｅｐａｒ...     

SYNTHESES AND MOLECULAR STRUCTURES OF THE ASYMMETRICAL DIPHOSPHINE LIGANDS AND THEIR Pt, Ni ORGANOMETALLIC COMPLEXES

In this paper, we report a novel two-step synthetic method of the symmetrical and asymmetrical diphosphine ligands 1, 2-bis(ditertbutylphosphino)ethane and 1, 2-bis(phenyltertbutylphosphino) ethane, and simultaneously establish a novel synthetic method of diphosphine ligand 1, 4-bis(phosphinocyclopentyl)butane with larger chelate ring. The former was prepared from the reaction of 1, 2-bis(dichlorophosphino)ethane with Grignard reagent andalkyl lithium, respectively, the latter from the reaction of 1, 4-di-Grignard reagent with PCl_3. Furthermore, a series of organometallic complexes of Pt, Ni containing diphosphine chelate ligand were prepared from the reaction of (COD) PtCl_2 complex with diphosphine. These complexes are very stable. Among these complexes, the molecular structures of (d(t-Bu)pe)-PtCl_2, (dPCypb)PtCl_2 and ((n-Bu) (PCyp))_2PtCl_2 complexes have been determined by X-ray diffraction method indicating they are novel complexes. The influence of diphosphine ligand on the molecular structure     

EVIDENCE FOR AROMATIC sp~2 C－H…O＝C INTRAMOLECULAR INTERACTION IN PYRIDINO AND BENZOBENZANTHRONE SKELETONS

ＥＶＩＤＥＮＣＥＦＯＲＡＲＯＭＡＴＩＣｓｐ~２Ｃ－Ｈ…Ｏ＝ＣＩＮＴＲＡＭＯＬＥＣＵＬＡＲＩＮＴＥＲＡＣＴＩＯＮＩＮＰＹＲＩＤＩＮＯＡＮＤＢＥＮＺＯＢＥＮＺＡＮＴＨＲＯＮＥＳＫＥＬＥＴＯＮＳ￥ＺｅｐｅｒＡＢＬＩＺ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔ?..     

THE INTERACTION OF ETHYL BENZOATE AND TRIFLUOROACETIC ACID IN EXCITED STATE

This paper is concerned with the interaction of ethyl benzoate (EBA) and trifluoroaceticacid (TFA) molecules in the excited state by measurements of steady--state and transient fluo-rescence spectra at room and low temperatures. The results show that not only the 1:1 exci-plex but also the 2:1 triplex between EBA and TFA was formed. The formation pathway ofthe triplex is that the exciplex formed at first, then by the interaction with the EBA mole-cule it transformed into triplex. But it could not be formed by the dimer of EBA by interac-tion with TFA. The dimer of EBA is confirmed in the concentrated solution. So there arefour components in EBA/TFA--concentrated solution and their fluorescence lifetimes aremeasured respectively.     

THE CRYSTAL STRUCTURE AND SPECTROSCOPIC PROPERTIES OF THE COMPLEXES FORMED BY TiCl_4 AND MgCl_2 WITH ESTERS——A RESEARCH ON THE STRUCTURE OF HIGHLY EFFICIENT CATALYSTS FOR POLYPROPYLENE

The complexes of TiCl_4, MgCl_2 and esters which are significant in industry have beenstudied by X-ray diffraction, IR and uv spectra. Their single crystal structures have also beendetermined. TiCl_4 and PhCOOEt can form two complexes, TiCl_4·L and TiCl_4·2L·MgGl_2, CH_3COOEtand H_2O form complex MgCl_2·2CH_3COOEt·2H_2O. All of them are molecular crystals. Theirspacial groups are C_(2h)~5-P2_1/c, C_(2h)~5-P2_1/n and C_(2h)~6-C_2/c respectively. From the XRD powderpattern, it has been ascertained that TiCl_4·L is formed in the process of the catalyst prepara-tion with milling-soaking method. Comparison between the IR spectra of the catalyst and Mgcomplex indicates that the coordinative bonds of the surface complex of the catalyst are verysimilar to that of the complex.     

MICROENVIRONMENTAL EFFECT ON THE INTRAMOLECULAR PHOTOCHEMICAL INTERACTION OF BIS－COUMARINYL COMPOUNDS CONTAINING ALKYL CHAINS

ＭＩＣＲＯＥＮＶＩＲＯＮＭＥＮＴＡＬ　ＥＦＦＥＣＴ　ＯＮ　ＴＨＥ　ＩＮＴＲＡＭＯＬＥＣＵＬＡＲ　ＰＨＯＴＯＣＨＥＭＩＣＡＬ　ＩＮＴＥＲＡＣＴＩＯＮ　ＯＦ　ＢＩＳ－ＣＯＵＭＡＲＩＮＹＬ　ＣＯＭＰＯＵＮＤＳ　ＣＯＮＴＡＩＮＩＮＧ　ＡＬＫＹＬ　ＣＨＡＩＮＳ...     

SOME REGULARITIES IN THE SYNTHESES AND STRUCTURE OF LINEAR MOLYBDENUM-IRON-SULFUR CLUSTER COMPLEXES

Linear Mo-Fe-S cluster complexes with basic unit of MoS_4 can be divided into four types ac-cording to the central Mo-S skeleton (S_2MoS_2Fe, S_2MoS_2FeS_2MoS_2, S_2MoS_2FeS_2Fe, FeS_2MoS_2Fe).Ten such complexes with various ligands and cations were synthesized, and their crystal structureswere determined and characterized by electron spin resonance, infrared and electron absorptions,Mossbauer and magnetic effects. Atomic distances from crystallographic analysis were comparedsystematically with respective spectroscopic data. There is strong evidence indicating that electrontransfers from Fe(Ⅱ) to Mo(Ⅵ), in spite of the fact that the apparent oxidation state of molyb-denum in most of the aforementioned complexes remains six. The probability of this electrontransfer depends strongly on the environment of Fe(Ⅱ). The fact that MoS_4~(2-) is both a goodbidentate ligand and an effective electron transfer unit is also evidence for its presence in manymolybdoenzymes and as a catalytically active center.     

SYNTHESIS AND CHARACTERIZATION OF THE COMPLEXES OF β－ALKOXYCARBONYLETHYLTIN TRICHLORIDES WITHDBSO AND HMPA

ＳＹＮＴＨＥＳＩＳＡＮＤＣＨＡＲＡＣＴＥＲＩＺＡＴＩＯＮＯＦＴＨＥＣＯＭＰＬＥＸＥＳＯＦβ－ＡＬＫＯＸＹＣＡＲＢＯＮＹＬＥＴＨＹＬＴＩＮＴＲＩＣＨＬＯＲＩＤＥＳ　ＷＩＴＨＤＢＳＯＡＮＤＨＭＰＡＬａｉＪｉｎＴＬＡＮ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓ...     

THE SIMULTANEOUS DISCHARGES OF TWO NEURONS IN N. Pf AND RF AND THE INFLUENCES ON THEM BY STIMULATING CENTRAL GRAY MATTER

This paper employs the method of simultaneous recording of the electric discharges oftwo neurons with two microelectrodes to study the interrelationship of simultancous electricactivities of pain excitation neurons (PEN) and pain inhibition neurons (PIN) in N. parafas-cicularis (Pf) of thalamus and reticular formation (RF) of midbrain in 42 rats. The resultsprove: (i) There are both PEN and PIN in RF in midbrain and they act coordinately;(ii) noxious messages may simultaneously act on PEN and PIN in N. Pf and RF, and thereciprocal coordination of electric activities of these two kinds of neurons is very obvious;(iii) stimulating central gray matter or injecting morphine may weaken the activities ofPEN simultaneously, with the opposite effects on PIN.     

A STUDY ON THE STRUCTURE AND PROPERTIES OF POLYBUTYLALDEHYDE FORMED IN LOW TEMPERATURE PLASMA

The polybutylaldehyde obtained by plasma polymerization was investigated by means of IR, X-ray diffraction, GC-MS, elementary analysis, TEM, electron diffraction and contact angle measurements etc. The results showed that the polymer formed in plasma is amorphous crosslinked polymer, and its backbone is made of carbon atoms. The surface energy of the polymer film is independent of the polymerization conditions. No addition reaction has taken place in the carbonyl group of butylaldehyde in the plasma condition. The result of the wettability measurements showed that the polymer film is generally hydrophobic and the surface energy of the film is about 41 dyn/cm, in which the dispersion force contribution is the majority. The electron diffraction proved that some crystal substance, even the single crystals were present in the polymer. X-ray diffraction also proved the presence of crystal and showed about 15% crystaUinity fraction.     

THE COLUMINESCENCE EFFECT OF RARE EARTH COMPLEXES IN LANGMUIR－BLODGETT FILMS

ＴＨＥＣＯＬＵＭＩＮＥＳＣＥＮＣＥＥＦＦＥＣＴＯＦＲＡＲＥＥＡＲＴＨＣＯＭＰＬＥＸＥＳＩＮＬＡＮＧＭＵＩＲ－ＢＬＯＤＧＥＴＴＦＩＬＭＳ￥ＧｕｏＬｕｎＺＨＯＮＧ；ＲｅｎＪｉｅＺＨＡＮＧ；ＫｏｎｇＺｈａｎｇＹＡＮＧ；ａｎｄＧｕｉＹｕｎＺＨＵ（Ｉｎｓｔｉｔ...     

ENTHALPY－ENTROPY COMPENSATION IN THE INCLUSION OF 1－SUBSTITUTED NAPHTHALENES BY β－CYCLODEXTRIN IN WATER

ＥＮＴＨＡＬＰＹ－ＥＮＴＲＯＰＹＣＯＭＰＥＮＳＡＴＩＯＮＩＮＴＨＥＩＮＣＬＵＳＩＯＮＯＦ１－ＳＵＢＳＴＩＴＵＴＥＤＮＡＰＨＴＨＡＬＥＮＥＳＢＹβ－ＣＹＣＬＯＤＥＸＴＲＩＮＩＮＷＡＴＥＲ￥ＱｉｎｇＸｉａｎｇＧＵＯ；ＸｉａｏＱｉＺＨＥＮＧ；ＳｈｕａｎｇＨ...