Infra-Red O–H Band and Association

Errera, Jacques; Gaspart, Richard; Sack, H. S.

doi:10.1063/1.1750569

Cited by 56 publications

(21 citation statements)

References 19 publications

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“…86f.L. This banel also appears in carbohy drates such as sugars and cellulo e. It has been ascrib ed to the climer sta te of aggregation by several workers [3,4], bu t a tLe m.pL aL proo f have b een in direct and noL entirely concl usive. Direct m ethods have been uns uccessfu l because, invaria bly in solu tions over a range of concentration , m on.omer, climer , and poly m er s L ates of aggr egatio n coexist.…”

Section: Confirmation Of the Assignment Of The 286-micronmentioning

confidence: 99%

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Infrared studies of association in eleven alcohols

Smith¹,

Creitz²

1951

J. RES. NATL. BUR. STAN.

134

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This work provides information t o facili tate the in terpreta tio n of the st ru ct ures of carbohydrates in te rms of t heir infrared absorption sp ectra and additional knowledge of t he properties of alcohols as associated solven ts. The spectra of met ha nol, I-dodecanol, 2-meth yl-2-propanol (t-bu tyl a lco hol), 3-pen tanol, 3-methy l-3-pentanol, 2,2,4-t rimethy l-3-p en tanol, 2, 4-di methy 1-3-ethyl-3-penta no l, 2,2, 4-t ri methy 1-3-ethyl-3-pentanol , 2,2, 4-t rimethyl-3-isopropy l-3-pe ntanol, 2,2,4,4-tetra methy l-3-n-prop yl-3-pentanol, and 2,2,4,4-tet ram ethy l-3-isopropyl-3-penta nol ha ve bee n studied .Some of t he effects of dilu tion in nonpolar solve nts, and of s teric hindra nce by bran chin g, on t heir in te rmolecular associatio n t hrough t he formation of h ydrogen bridges ha ve bee n determined.E vidence is prese nted for t he exis tence of a s ingle-bridge type of dimer. The assignment of the ba nd a t 2.86 microns to dime r has been giv en stron g support. An isobestic poin t , at which t he molar abso rban cy index (28.6) is indepe ndent of the degree of dissociation, was found at 8.82 mi cron s in t he spectrum of 3-pe ntanol. Ot hers not so weil marked appear in t he spectra of some of t he other al cohols. Such poin ts fa cili tate t he qua nti tative d etermination of s uch al co hols in favorabl e circumst an ces.The abso rp t ions of t he mon omer a nd t he dimer, separately, a ppear to obey Beer's la w. Both the monomer and the sin gle-bridge dime r a ppear to contribu te to the free hydroxyl absorp t ion ; t heir re lat iv e co ntribu t io ns d epend upon the co nce nt ration of t he so lu tio ll.

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Section: Confirmation Of the Assignment Of The 286-micronmentioning

confidence: 99%

“…A band at approximately 2.86/J. (3,497 em-I) h as been ascrib ed [3,4] to th e fundamental str etching vibr ation of the 0 -H in dimer in which the hy drogen participate in a bridge between its own oxygen and th e oxygen of ano ther molecule. In s uch cases, r epresen ted in Jigm e 1 by the bridged 0 -H .…”

Section: Introductionmentioning

confidence: 99%

Infrared studies of association in eleven alcohols

Smith¹,

Creitz²

1951

J. RES. NATL. BUR. STAN.

134

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“…The position of this band has been attributed [14,15] to the type of hydrogen bonding between th e two alcohol molecules, which are associated in some manner , which leads to the formation of a dimer alcohol molecule. The presence of this vibration in different dried cellulose derivatives suggests that the mechanism by which the cellulose chains are bound together may possibly b e of the " dimer " type and common to many cellulose derivatives.…”

Section: Hydrogen Bonding In Cellulosementioning

confidence: 99%

Effect of deuteration, oxidation, and hydrogen-bonding on the infrared spectrum of cellulose

Rowen¹,

Plyler²

1950

J. RES. NATL. BUR. STAN.

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Regenerated cellulose film s were immersed in heavy water (99 .58 % D 20 ) at temperatures up t o 52° C for a s long as 100 hours in an attempt to effect a substitution of D for the H in the OH groups of the ccllulose. The intensity of the OH vibration in t he 3-micron region of the spectrum of t he films decreased very little. A weak OD vibration appeared in the 4.-m icron r egion . Th e res ul ts indicate t hat only a sm all fraction of the OR gro ups of t he cellulose participated in an exchange under t he condi t ions of t he ex p erim ents.The infrared spectra from 2 to 16 mi crons of cellulo e nitrate, nitroge n diox id e oxidized cellu lose, alg inic acid, and sodium alginate arc recorded. A co mparison of th e spectra of t hese polysaccharides indicates t hat the stron g band at . 5. 75 mi cro ns in the spectrum of the ox idized cellu lose is due to t he G= O vibration of the carboxyl glOUp, a nd l hat the band, at 6.07 and 7.01 mi crons arc due to nitrogen-oxygen vibrations.The intense bands in the 3-micron region of the spectra of a number o f cellulose deri\"atives, attribu ted to hydro xyl g l'OUpS, were examined with the aid of the hi gh-dispersion lithium fluoride prism . The minima of t he bands were exactly at or close (,0 2. 6 m icron s (3,500 em-I) . The possibility of the existence of a common typ e of h ydrogen bond in t he cellulose deri v-atives is discus cd.

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“…В опытах Ландсберга и Ухолила 13 эффект уширения полосы вследствие повышения температуры, по-видимому, перекрывается эффектом сужения полосы за счет упрощения структуры жидкости, т. е. за счет изменения относитель-ного числа различных ассоциированных комплексов. Это предположение находит подтверждение в ряде работ 18 , 19 , в том числе и наших по иссле-дованию зависимости спектров инфракрасного поглощения растворов спиртов в нейтральных растворителях от температуры и концентрации (см. ниже, § 4, в).…”

Section: таблицаunclassified

“…Такая интерпретация находит под-тверждение в исследованиях (см. также 19 ) зависимости относительной интенсивности наблюдаемых максимумов ν = 3340 см" 1 . Таким образом, эффекты, наблюдаемые при повышении температуры раствора, аналогичны тому, что происходит при уменьшении концентрации.…”

Section: рис 2 спектр комбинационного рассеяния кристалла в(он)unclassified

Исследование Водородной Связи Спектроскопическими Методами

Malyshev¹

1957

Usp. Fiz. Nauk

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Infra-Red O–H Band and Association

Abstract: The vibration of the O–H group in alcohol and HDO has been studied in the 3μ region for solutions and ternary mixtures at different concentrations and temperatures. The experimental results are discussed in terms of association and addition-compound formation.

Cited by 56 publications

References 19 publications

Infrared studies of association in eleven alcohols

Infrared studies of association in eleven alcohols

Effect of deuteration, oxidation, and hydrogen-bonding on the infrared spectrum of cellulose

Исследование Водородной Связи Спектроскопическими Методами

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