Absorption of near-infrared energy by certain glasses

Florence, J.M.; Allshouse, C.C.; Glaze, F.W.; Hahner, C. H.

doi:10.6028/jres.045.011

Cited by 25 publications

(7 citation statements)

References 6 publications

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“…UV−vis−NIR absorption data were collected using two different instruments in transmission geometry: a Cary 50 UV−vis spectrophotometer (Varian) for spectra with photon energy down to 1.25 eV and a Cary 5000 UV−vis−NIR spectrophotometer (Varian) for the spectra with energy down to 0.375 eV (because of absorption of the glass, 38 information about the organic films can be extracted only above ∼0.5 eV). Thin films with different D/A mixing ratios were measured down to 1.25 eV, as shown in the Supporting Information, Figure S4.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Thin-Film Texture and Optical Properties of Donor/Acceptor Complexes. Diindenoperylene/F6TCNNQ vs Alpha-Sexithiophene/F6TCNNQ

et al. 2018

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In this work, two novel donor/acceptor (D/A) complexes, namely, diindenoperylene (DIP)/1,3,4,5,7,8-hexafluoro-tetracyanonaphthoquinodimethane (F6TCNNQ) and alpha-sexithiophene (6T)/F6TCNNQ, are studied. The D/A complexes segregate in form of π–π stacked D/A cocrystals and can be observed by X-ray scattering. The different conformational degrees of freedom of the donor molecules, respectively, seem to affect the thin-film crystalline texture and composition of the D/A mixtures significantly. In equimolar mixtures, for DIP/F6TCNNQ, the crystallites are mostly uniaxially oriented and homogeneous, whereas for 6T/F6TCNNQ, a mostly 3D (isotropic) orientation of the crystallites and coexistence of domains of pristine compounds and D/A complex, respectively, are observed. Using optical absorption spectroscopy, we observe for each of the two mixed systems a set of new, strong transitions located in the near-IR range below the gap of the pristine compounds: such transitions are related to charge-transfer (CT) interactions between donor and acceptor. The optical anisotropy of domains of the D/A complexes with associated new electronic states is studied by ellipsometry. We infer that the CT-related transition dipole moment is perpendicular to the respective π-conjugated planes in the D/A complex.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

Thin-Film Texture and Optical Properties of Donor/Acceptor Complexes. Diindenoperylene/F6TCNNQ vs Alpha-Sexithiophene/F6TCNNQ

et al. 2018

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“…The glasse investigatcd were from a series furnish ed by F. W. Glaze and J. M. Florence as a part of th eir gen eral study of infrared transmittance of glasses [25,26]. The compositions of these glasses w er e computed from the ba tch and arc identified throughout the text of this paper as weight p ercent in th e ratio of Na20:PbO: Si02.…”

Section: Methodsmentioning

confidence: 99%

Electrode function (pH response), hygroscopicity, and chemical durability of soda-lead oxide-silica glasses

Hubbard¹,

Black²,

Rynders³

1950

J. RES. NATL. BUR. STAN.

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The pH ~·espo.n.s e, hygroscopicity, and chemical durability of a series of Na,O-PbO-Si02 (soda-lead oXlde-slhca) glasses have been investigated . The results obtained ar~ in complete acco:d WLth the data prevIOusly publls~e.d fOl: a series of N a20 -CaO-Ri02 glasses and show t~at. 1. Glasses of very: low hy~r~scoplclty YIeld electrodes whose pH responses fall appreCiably below ~he theoret.lcal 59 I11Ilhyolts per pH at 2.5 0 C; 2. electrodes prepared from glasses of P?or chemIcal dU:'ablhty also fal~ to d evelop the full theoretical voltage. . Vi ~en the app~ox lm ate compOSItIOns at wluch changes in the primary phase appear for the Na20 -PbO-SI02 system .are supenmposed upon the pH response and chemical durability c.urves, the marked ch[Lnge.s 111 t l? ese properties appear to reflect some of the criti cal compositions of the phase eqUIlibrium d iagram .. The chemical dura.bilit~ data obtaiI? ed b y the interferometer procedure indicate that the pioperty ?f swellmg 111 aCid solu tions IS much more universal for sili cate glasses than previously realized.

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“…The proced ure for t.he preparation of the glasses and for t he transmittance measurements has b een given in previous publications [1,2]. During Lhe finin g of several of the glasses, dry air was introduced into th e bottom of the m el t by m eans of a platinum Lube for 2 hI'.…”

Section: Preparation Of the Glassesmentioning

confidence: 99%

“…The st udy of lhe transm ittance of infrared energy b.\-glass [1,2,3] '~ at the National Bureau of tandarcls has resulted in t he p reparation of glasses departing from t he ol'clinar)' glass compositions. The common glass-forming oxides ar e B20 3, P 20 5, and S IO~.…”

Section: Introductionmentioning

confidence: 99%

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Infrared transmittance of some calcium aluminate and germanate glasses

Florence¹,

Glaze²,

Black³

1955

J. RES. NATL. BUR. STAN.

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The infrared transmittance of some calcium aluminate and germanate glasses has b ecn measured out to 6 microns. The range of compositions of the calcium alum inate glasses was CaO , 26.7 to 52 .0 pOl'cent, and A1z03, 28.2 to 49.6 perccnt. Barium oxide, BeO, Bi20 3 • La20 z, MgO, a nd PbO were added in varying amounts up to a maximum of 36.0 percent for anyone constitucnt. These calcium alumi nate glasses are good infrared t ransm itters but show a prominent water absorption band at 2.9 to 3.0 m icrons. This absorption ca~ be decreased somewh at by means of a dry air t reatment of the melt. Thcse glasses have a st rong tendency toward devitrification .Ge rmanium oxide is a good glass-fo rmer. Its glasses have about the same infrared t ransmi ttance as the calcium aluminate glasses in the absence of ox ides such as Si02 and BcO, " ' hich absorb in the '1.5-to 5.5-micron region .

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Absorption of near-infrared energy by certain glasses

Cited by 25 publications

References 6 publications

Thin-Film Texture and Optical Properties of Donor/Acceptor Complexes. Diindenoperylene/F6TCNNQ vs Alpha-Sexithiophene/F6TCNNQ

Thin-Film Texture and Optical Properties of Donor/Acceptor Complexes. Diindenoperylene/F6TCNNQ vs Alpha-Sexithiophene/F6TCNNQ

Electrode function (pH response), hygroscopicity, and chemical durability of soda-lead oxide-silica glasses

Infrared transmittance of some calcium aluminate and germanate glasses

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