Absolute Luminescence Spectra via Digital-Technique and Time-Resolved Spectroscopy

L. Costa; F. Grum; D. J. Paine

doi:10.1364/AO.8.001149

Applied Optics
Vol. 8,
Issue 6,
pp. 1149-1155
(1969)
•https://doi.org/10.1364/AO.8.001149

Absolute Luminescence Spectra via Digital-Technique and Time-Resolved Spectroscopy

L. Costa, F. Grum, and D. J. Paine

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L. Costa, F. Grum, and D. J. Paine, "Absolute Luminescence Spectra via Digital-Technique and Time-Resolved Spectroscopy," Appl. Opt. 8, 1149-1155 (1969)

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Abstract

Most instruments intended for luminescence spectroscopy fall in the category of uncorrected spectrofluorimeters. In many routine analyses, uncorrected spectra are useful, especially if they do not have to be compared with others from different laboratories. However, for theoretical work, results must be on an absolute basis. This paper describes a method and the related equipment that have been developed and used to obtain, on an absolute basis, many of the parameters that are important in photochemical research. The system can provide absolute emission spectra, absolute excitation spectra, and quantum efficiencies for luminescence, fluorescence, delayed fluorescence, and phosphorescence. Also, it can measure the half-life of phosphorescence and of delayed fluorescence. Provision is made for the independent and continuous control of the time between excitation and detection pulses, thus allowing the measurement of the half-life at any wavelength of emission. With these provisions it is possible to resolve overlapping fluorescence, delayed fluorescence, and phosphorescence spectra.

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MODE OF OPERATION: EMISSION SPECTRA													***PARAMETER CODE: 5035010012
DATA ECHO:		18	15	13	13	16		18	20	25		20	37	72	61		65
		74	87	85	95	101		122	144	160		212	228	250	288		327
		371	423	449	517	572		612	686	716		745	823	826	892		876
		877	857	821	794	713		624	555	462		341	251	171	107		74
		38	19	12	8	6
EXCITATION WAVELENGTH:				350 NANOMETERS
EXCITATION (BEL) SLIT:				5.0 MM.									**SLIT FUNCTION = 0.9999910E 00
EMISSION (DK–2) SLIT:				1.00 MM.
SCALE:				0–10
EXCITATION BANDWIDTH:				6.00 NANOMETERS EXCITATION ENERGY AT 350 NANOMETERS = 0.2045979E 02 MICROWATTS/NM. (0.3605180E 14 QUANTA/SEC./NM.)
LAMBDA	WAVENUMBER			SCALED APPARENT INTENSITY			(ZERO-SHIFT) CORRECTED INTENSITY				(EMISSION SLIT) CORRECTED INTENSITY					TRUE INTENSITY (MICROWATTS/NM.)		CONVERSION FACTOR	TRUE INTENSITY (QUANTA/SEC./NM.)

600	0.1666666E 05			0.72			0.42				0.6391916E-02					0.1842789E-03		0.3020709E 13	0.5566531E 09
595	0.1680672E 05			0.61			0.31				0.4717842E-02					0.1333403E-03		0.2995536E 13	0.3994258E 09
590	0.1694915E 05			0.65			0.35				0.5326595E-02					0.1498531E-03		0.2970364E 13	0.4451180E 09
585	0.1709402E 05			0.74			0.44				0.6696295E-02					0.1863110E-03		0.2945192E 13	0.5487214E 09
580	0.1724138E 05			0.87			0.57				0.8674745E-02					0.2401776E-03		0.2920019E 13	0.7013230E 09
575	0.1739130E 05			0.85			0.55				0.8370370E-02					0.2304697E-03		0.2894847F 13	0.6671744E 09

415	0.2409638E 05			3.41			3.11				0.4733061E-01					0.2862981E-02		0.2089323E 13	0.5981692E 10
410	0.2439024E 05			2.51			2.21				0.3363364E-01					0.2217632E-02		0.2064151E 13	0.4577526E 10
405	0.2469136E 05			1.71			1.41				0.2145856E-01					0.1620120E-02		0.2038979E 13	0.3303391E 10
400	0.2500000E 05			1.07			0.77				0.1171850E-01					0.9389916E-03		0.2013806E 13	0.1890947E 10
395	0.2531645E 05			0.74			0.44				0.6696295E-02					6.5483930E-03		0.1988634F 13	0.1090553E 10
390	0.2564102E 05			0.38			0.08				0.1217506E-02					0.1103864E-03		0.1963461E 13	0.2167393E 09

Standard	Molar concentration	Solvent	Excit. (nm)	Measured	Literature
9,10-Diphenylanthracene	1.5 × 10⁻⁴	hexane	392	1.00	1.0019
Rhodamine B	1 × 10⁻⁴	ethanol	535	0.60	0.6922
Quinine sulfate	1.6 × 10⁻⁴	0.1N H₂SO₄	355	0.56	0,5521,22
					(0.46)19

MODE OF OPERATION: EMISSION SPECTRA													***PARAMETER CODE: 5035010012
DATA ECHO:		18	15	13	13	16		18	20	25		20	37	72	61		65
		74	87	85	95	101		122	144	160		212	228	250	288		327
		371	423	449	517	572		612	686	716		745	823	826	892		876
		877	857	821	794	713		624	555	462		341	251	171	107		74
		38	19	12	8	6
EXCITATION WAVELENGTH:				350 NANOMETERS
EXCITATION (BEL) SLIT:				5.0 MM.									**SLIT FUNCTION = 0.9999910E 00
EMISSION (DK–2) SLIT:				1.00 MM.
SCALE:				0–10
EXCITATION BANDWIDTH:				6.00 NANOMETERS EXCITATION ENERGY AT 350 NANOMETERS = 0.2045979E 02 MICROWATTS/NM. (0.3605180E 14 QUANTA/SEC./NM.)
LAMBDA	WAVENUMBER			SCALED APPARENT INTENSITY			(ZERO-SHIFT) CORRECTED INTENSITY				(EMISSION SLIT) CORRECTED INTENSITY					TRUE INTENSITY (MICROWATTS/NM.)		CONVERSION FACTOR	TRUE INTENSITY (QUANTA/SEC./NM.)

600	0.1666666E 05			0.72			0.42				0.6391916E-02					0.1842789E-03		0.3020709E 13	0.5566531E 09
595	0.1680672E 05			0.61			0.31				0.4717842E-02					0.1333403E-03		0.2995536E 13	0.3994258E 09
590	0.1694915E 05			0.65			0.35				0.5326595E-02					0.1498531E-03		0.2970364E 13	0.4451180E 09
585	0.1709402E 05			0.74			0.44				0.6696295E-02					0.1863110E-03		0.2945192E 13	0.5487214E 09
580	0.1724138E 05			0.87			0.57				0.8674745E-02					0.2401776E-03		0.2920019E 13	0.7013230E 09
575	0.1739130E 05			0.85			0.55				0.8370370E-02					0.2304697E-03		0.2894847F 13	0.6671744E 09

415	0.2409638E 05			3.41			3.11				0.4733061E-01					0.2862981E-02		0.2089323E 13	0.5981692E 10
410	0.2439024E 05			2.51			2.21				0.3363364E-01					0.2217632E-02		0.2064151E 13	0.4577526E 10
405	0.2469136E 05			1.71			1.41				0.2145856E-01					0.1620120E-02		0.2038979E 13	0.3303391E 10
400	0.2500000E 05			1.07			0.77				0.1171850E-01					0.9389916E-03		0.2013806E 13	0.1890947E 10
395	0.2531645E 05			0.74			0.44				0.6696295E-02					6.5483930E-03		0.1988634F 13	0.1090553E 10
390	0.2564102E 05			0.38			0.08				0.1217506E-02					0.1103864E-03		0.1963461E 13	0.2167393E 09

Standard	Molar concentration	Solvent	Excit. (nm)	Measured	Literature
9,10-Diphenylanthracene	1.5 × 10⁻⁴	hexane	392	1.00	1.0019
Rhodamine B	1 × 10⁻⁴	ethanol	535	0.60	0.6922
Quinine sulfate	1.6 × 10⁻⁴	0.1N H₂SO₄	355	0.56	0,5521,22
					(0.46)19

Abstract

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Figures (9)

Tables (2)

Equations (5)

Applied Optics