Ultraviolet Spectra of Aromatic Compounds

Friedel, R. A.; Orchin, Milton

doi:10.1366/000370252774652631

Cited by 169 publications

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“…A study of the spectra compiled b y Friedel and Or chin [10] indicates that the shape of the curves for the acidaffins, nitrogen bases, and benzene-and m ethanol-eluted portions could result from mixtures of various aromatic and aromatic polar compounds, in agreement with the results of the infrared studies. However, the data of Braude [3] show that conjugated dienes and trienes absorb at 217 and 265 }L, respectively.…”

Section: Far Infrared and Ultraviolet Spectraexplora Tory Studiessupporting

confidence: 66%

A spectroscopic study of oils used in oil-extended rubber

Linnig¹,

Stewart²

1957

J. RES. NATL. BUR. STAN.

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. Knowl ed.ge of t he cOITlpos ition of oil s ll sed in oil-exte nd ed rubber is useful in s peeif.,·ing ot! types and til understand In g t he proper ties of t he oil-rub ber master batches. In th is work , elucidation of structure has bee n attempted by a compari so n of infrared spectra betwee n 2 and 15 microns of two se ri es of oil fractions obtaincd by bas icall y d iffere nt me thods. FractIOns of a number of differe nt oils or oil dist illates were studied. The spectra ,,"e re com pared wit h reference to t he method of separat io n and in some cases t o t he phys ical and chen1ical propert ies of t h e fractions. Ther e are marked s imilarities between ccrtain of the fraction s se parated by t he two methods. However, t he s tud~' indicates a variabi lity of stryctural types fro m one oil to another. This is esp eciall y t ru e for t he more p olar f ractio ns. It lss uggested that t hi s va rab ili ty, especially with res pect t o polar groups a nd other structures lead lllg to act lv" h yd rogens, could accou nt for t he obse rv ed variabili ty in t he aging propert ies of master batc hes co ntaining difi'ere nt oils or oil fraction s.Spectra were a lso obtain ed of a few t~' pica l fr actio ns in t he ul t rav iolet range bet\\'ee n 2 10 a nd 340 mi ll imicron s a nd in the far infrared be l\\'ee n 15 and 40 m icro ns.

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Section: Far Infrared and Ultraviolet Spectraexplora Tory Studiessupporting

confidence: 66%

A spectroscopic study of oils used in oil-extended rubber

Linnig¹,

Stewart²

1957

J. RES. NATL. BUR. STAN.

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“…Five distinct peaks can be seen, at 405, 385, 380, 365, 347, with a discontinuity at 395 m/u. The spectra of only two rare polynuclear hydrocarbons of many that have been reported are closely enough aligned to that of 3,4 benzpyrene to raise serious doubts of the identity (9-methylanthracene and 1: 12-benzperylene) (Friedel and Orchin, 1951). Fluorescence eliminates the latter as its fluorescence spectrum is completely different from that of 3,4-benzpyrene (Fig.…”

Section: V Cigarsmentioning

confidence: 80%

3,4-Benzpyrene in the Smoke of Cigarette Paper, Tobacco, and Cigarettes

Cardon¹,

Alvord²,

Rand³

et al. 1956

Br J Cancer

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RECENT statistical studies suggest a relationship between the increasing incidence of lung cancer and smoking. This implies carcinogenic activity by the smoke (Doll and Hill, 1950;Hammond and Horn, 1954;Wynder and Graham, 1950). Accordingly, for several years this laboratory has been investigating the nonvolatile fractions of the smokes of cigarettes, cigarette paper, and tobacco for possible known carcinogens. The statistical studies (Hammond and Horn, 1954) on the relation of lung cancer and smoking pointed especially at cigarette smoking and indicated little or no relation to cigar and pipe smoking. One major difference between these types of smoking is, of course, the cigarette paper. Initially, it was thought the carcinogenic activity might be wholly due to the paper, and we were thus stimulated to start with the paper alone.Indications of fluorescence, characteristic of the benzanthracene derivatives, was first noted by Carroll and Rand (unpublished observations) in the tars from cigarette paper smoke. The fluorescence was found by us to be due to 3,4-benzpyrene.The technique for burning the paper was not designed to simulate the conditions of actual cigarette smoking. The paper was smouldered in a stream of air (Fig. 2), the highest temperature reached at the burning front (650-950°C.) being in the same range as that attained in a cigarette during inhalation (Wynder, Graham and Croninger, 1953). It was felt that the combusion products would vary with temperature of burning but that qualitatively the same products would be formed. Work subsequently published by Cooper and Lindsey (Cooper and Lindsey, 1954; Cooper, Lindsey and Waller, 1954) on cigarettes made wholly of cigarette paper without tobacco and smoked in an apparatus designed to simulate actual smoking conditions supports this assumption; 3,4-benzpyrene was obtained by these workers although in smaller yields than obtained by us. Additional substantiation was provided by the work on the whole cigarette; the quantity of 3,4-benzpyrene produced was in line with that expected from the results on the paper and tobacco burned separately.Subsequently we found 3,4 benzpyrene in the smokes of tobacco, cigarettes, and cigars. The cigarettes and cigars were smoked in a smoke sampling apparatus designed to approximate average conditions of actual smoking.Much of the work reported here is a duplication with some extension of similar work by Lindsey and Cooper and is further confirmation of their results. ' * Material from this paper has been presented at

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“…Finally, very broad bands centered at ca. 3400 cm -1 in all complexes c a n be assigned to the ν(OH) modes of lattice water in the corresponding framework [33][34][35][36] . L which can be assigned to the intra-pantoprazolate charge transfer (π→π*) transition, in the phenyl and imidazole parts of the PA ligand 37 .…”

Section: Ir Spectra and Mode Of Chelationmentioning

confidence: 95%

Synthesis, characterization and DNA-Binding properties of the novel mononuclear Zn(II), Cd(II), and Mn(II) complexes with Pantoprazole

El-Sayed¹,

Ali²

2016

Mediterr.j.chem

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A novel mononuclear Mn(II), Zn(II) and Cd(II) complexes of pantoprazole (PA) was synthesized and characterized by elemental analysis, molar conductivity, magnetic susceptibility measurements, IR, UV-visible spectral studies, and thermal analysis. The electronic spectra along with magnetic data suggest octahedral geometry for Mn(II), Zn(II) and Cd(II) complexes. PA acts as an anionic bi-dentate ligand being coordinated by (S=O) oxygen and benzimdazolyl nitrogen atoms. The interaction of the complexes with calf thymus DNA (CT-DNA) was monitored by blue shift and hyperchromism in the UV-vis spectra. The observed i n t r i n s i c b i n d i n g c o n s t a n t s together with structural analysis of the complexes indicate the groove binding. The binding constants were determined at 303°K, 308°K and 313°K. A thermodynamic analysis showed that the reaction is spontaneous with ΔG being negative. The enthalpy ΔH and the entropy ΔS of reactions were all determined.

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Ultraviolet Spectra of Aromatic Compounds

Cited by 169 publications

References 0 publications

A spectroscopic study of oils used in oil-extended rubber

A spectroscopic study of oils used in oil-extended rubber

3,4-Benzpyrene in the Smoke of Cigarette Paper, Tobacco, and Cigarettes

Synthesis, characterization and DNA-Binding properties of the novel mononuclear Zn(II), Cd(II), and Mn(II) complexes with Pantoprazole

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