Nonparametric High-Resolution Coherent 3D Spectroscopy as a Simple and Rapid Method for Obtaining Excited-State Rotational Constants

2018 ◽  
Vol 122 (44) ◽  
pp. 8794-8801
Author(s):  
Thresa A. Wells ◽  
Victoria J. Barber ◽  
Muhire H. Kwizera ◽  
Patience Mukashyaka ◽  
Peter C. Chen
Keyword(s):  
Excited State ◽  
High Resolution ◽  
Rapid Method ◽  
Rotational Constants

High-resolution study of the υ9 fundamental band of trans-glyoxal

2001 ◽  
Vol 79 (2-3) ◽  
pp. 479-482 ◽  
Author(s):  
D B Braund ◽  
A RH Cole
Keyword(s):  
Excited State ◽  
High Resolution ◽  
Ground State ◽  
Type B ◽  
Rotational Constants ◽  
Fundamental Band ◽  
Stretching Vibration ◽  
Resolution Study

The spectrum of trans-glyoxal has been recorded at a resolution of about 0.004 cm–1 in the region from 2770 to 2900 cm–1. 1549 lines have been assigned to the type B band due to the υ9 (bu) fundamental (antisymmetric C–H stretching vibration). The ground-state rotational constants confirm earlier values and new constants are determined for the excited state of υ9. PACS No.: 33.20E

THE ABSORPTION SPECTRA OF HNO AND DNO

1962 ◽  
Vol 40 (3) ◽  
pp. 322-347 ◽  
Author(s):  
J. L. Bancroft ◽  
J. M. Hollas ◽  
D. A. Ramsay
Keyword(s):  
Excited State ◽  
High Resolution ◽  
Absorption Spectra ◽  
Line Width ◽  
Geometrical Parameters ◽  
Rotational Constants ◽  
Long Wavelength ◽  
A Value ◽  
Emission Studies

The long wavelength 1A″ – 1A′ transition of HNO and DNO has been studied in absorption under high resolution using much greater absorption intensities than in the earlier work of Dalby. Seven new bands of HNO and six new bands of DNO have been found and analyzed. Values for [Formula: see text] have been found and are: [Formula: see text] and [Formula: see text]. Equilibrium rotational constants [Formula: see text], [Formula: see text], and [Formula: see text] have been determined for both molecules. The values for HNO give zero inertial defect but the values for DNO are less satisfactory, presumably due to resonance between pairs of levels (1, [Formula: see text], [Formula: see text]) and (0, [Formula: see text], [Formula: see text]). Equilibrium values for the geometrical parameters of the excited state have been evaluated and are: [Formula: see text] [Formula: see text], [Formula: see text].Some of the rotational lines of the (101)–(000) band of HNO are found to be slightly diffuse, the maximum observed line width being ~0.7 cm−1. This observation confirms the predissociation limit found in the emission studies of Clement and Ramsay and gives a value for the lifetime of the molecule in the excited state, viz τ ~7.6 × 10−12 sec. The predissociation is weak and the possible states causing this predissociation are discussed.

HIGH RESOLUTION RAMAN SPECTROSCOPY OF GASES: I. EXPERIMENTAL METHODS

1954 ◽  
Vol 32 (5) ◽  
pp. 330-338 ◽  
Author(s):  
B. P. Stoicheff
Keyword(s):  
Raman Spectroscopy ◽  
High Resolution ◽  
Magnesium Oxide ◽  
Raman Spectra ◽  
Experimental Methods ◽  
Resolving Power ◽  
Polar Molecules ◽  
High Current ◽  
Rotational Constants ◽  
Moments Of Inertia

An apparatus for obtaining intense Raman spectra of gases excited by the Hg 4358 line is described. It consists of a mirror-type Raman tube irradiated by two high-current mercury lamps, completely enclosed in a reflector of magnesium oxide. The lamps are externally water-cooled along their entire length and emit sharp lines of high intensity.Rotational Raman spectra of gases at a pressure of 1 atm. have been photographed in the second order of a 21 ft. grating in exposure times of 6 to 24 hr. The Raman lines are sharp and a resolving power of about 100,000 has been achieved. It will be possible to resolve the rotational Raman spectra, and hence to evaluate the rotational constants of molecules having moments of inertia of up to 300 × 10−10 gm. cm.2 Such investigations will be especially useful for non-polar molecules.

HIGH RESOLUTION RAMAN SPECTROSCOPY OF GASES: XIII. ROTATIONAL SPECTRA AND STRUCTURES OF THE ZINC-, CADMIUM-, AND MERCURY-DIMETHYL MOLECULES

1960 ◽  
Vol 38 (11) ◽  
pp. 1516-1525 ◽  
Author(s):  
K. Suryanarayana Rao ◽  
B. P. Stoicheff ◽  
R. Turner
Keyword(s):  
Raman Spectroscopy ◽  
High Resolution ◽  
Rotational Constants ◽  
Carbon Bond ◽  
Rotational Spectra ◽  
Bond Lengths ◽  
Zinc Cadmium ◽  
Symmetric Top Molecules

The pure rotational spectra of gaseous Zn(CH3)2, Cd(CH3)2, Hg(CH3)2, and of the fully deuterated molecules have been photographed with a 21-ft grating. The spectra are typical of symmetric top molecules and consist of many evenly spaced rotational lines having a separation of about 0.45 cm−1. An analysis of the spectra yielded the rotational constants (in cm−1)[Formula: see text]From these constants the following metal—carbon bond lengths were determined: Zn—C = 1.929 Å, Cd—C = 2.112 Å, and Hg—C = 2.094 Å. Relations for the C—H bond lengths and HCH angles were also obtained.

A rapid method for sex identification in Cannabis sativa using High Resolution Melt (HRM) analysis.

Botany ◽  
2021 ◽  
Author(s):  
Erin Jacqueline Gilchrist ◽  
Daniela Hegebarth ◽  
Shumin Wang ◽  
Teagen D. Quilichini ◽  
Jason Sawler ◽  
...  
Keyword(s):  
High Resolution ◽  
Rapid Method ◽  
X Chromosome ◽  
Cannabis Sativa ◽  
Sex Identification ◽  
Male Plant ◽  
High Resolution Melt ◽  
Male And Female ◽  
High Resolution Melt Analysis ◽  
Plant Sex

We report the identification of two SNPs in Cannabis sativa that are associated with female and male plant sex phenotypes, and are located on the top arm of the X chromosome. High Resolution Melt analysis was used to develop and validate a novel, rapid method for sex identification in medical/recreational cannabis as well as in hemp. This method can distinguish between dioecious male (XY) and dioecious female (XX) cannabis plants with 100% accuracy, and can also be used to differentiate between male and female Humulus lupulus (hop) plants.

High Resolution Infrared Spectra of the ν2 and 2ν1 Bands of 14N16O2

1975 ◽  
Vol 53 (19) ◽  
pp. 1902-1926 ◽  
Author(s):  
Aldée Cabana ◽  
Michel Laurin ◽  
Walter J. Lafferty ◽  
Robert L. Sams
Keyword(s):  
High Resolution ◽  
Infrared Spectra ◽  
Ground State ◽  
Equilibrium Structure ◽  
Coriolis Interaction ◽  
Rotational Constants ◽  
Average Structures

The infrared spectra of two B type bands, ν2 and 2ν1, of 14N16O2 have been recorded under high resolution. Ground state combination differences from these bands have been combined with combination differences obtained in previous studies and eight pure rotational microwave transitions to yield improved ground state rotational constants. Upper state constants and band centers for the ν2 and 2ν1 bands are also reported. The 2ν1 band contains internal intensity anomalies believed to arise from a weak Coriolis interaction with the much stronger ν1 + ν3 band. Equilibrium rotational constants have been calculated. The equilibrium structure of the molecule is: rc = 1.1945 ± 0.0005 Å and Θc = 133.85 ± 0.10°. For the sake of comparison, effective, substitution, and average structures are also reported.

The b1Σ+–X3Σ− band system of SO

1968 ◽  
Vol 46 (13) ◽  
pp. 1539-1546 ◽  
Author(s):  
R. Colin
Keyword(s):  
High Resolution ◽  
Microwave Discharge ◽  
Band System ◽  
Rotational Constants

The 0–0, 1–1, 2–2, and 0–1 bands of the b1Σ+–X3Σ− transition of the SO molecule have been observed in the afterglow produced when COS + O2 is pumped rapidly through a microwave discharge. The two strongest bands, 0–0 and 1–1, which lie respectively at 9549.08 and 9626.13 Å, have been photographed at high resolution and have been analyzed. Using the known X3Σ− rotational constants, the vibrational and rotational constants of the 1Σ+ state (Tc = 10 509.97 cm−1) have been determined: ωc′ = 1067.66 cm−1, Bc′ = 0.70262 cm−1, and rc′ = 1.5005 Å. Rotational intensity distributions for 1Σ+–3Σ− transitions are discussed. The a1Δ state of SO is predicted to lie at T ~ 6350 cm−1.

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