scholarly journals The Raman fingerprint of cyclic conjugation: the case of the stabilization of cations and dications in cycloparaphenylenes

2016 ◽  
Vol 7 (6) ◽  
pp. 3494-3499 ◽  
Author(s):  
Miriam Peña Alvarez ◽  
M. Carmen Ruiz Delgado ◽  
Mercedes Taravillo ◽  
Valentín G. Baonza ◽  
Juan T. López Navarrete ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Cyclic Conjugation

Cyclic conjugation and Biradical formation in charged cycloparaphenylenes are described by Raman spectroscopy and DFT.

Chameleon-like behaviour of cyclo[n]paraphenylenes in complexes with C70: on their impressive electronic and structural adaptability as probed by Raman spectroscopy

2014 ◽  
Vol 173 ◽  
pp. 157-171 ◽  
Author(s):  
Miriam Peña Alvarez ◽  
Paula Mayorga Burrezo ◽  
Takahiro Iwamoto ◽  
Lili Qiu ◽  
Miklos Kertesz ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Thermal Stresses ◽  
Supramolecular Complexes ◽  
Ordered Structure ◽  
Conformational Restriction ◽  
Ring Strain ◽  
Physico Chemical ◽  
Cyclic Conjugation ◽  
Structural Adaptability ◽  
Pressure Changes

A series of four 1 : 1 host–guest supramolecular complexes of [n]CPPs and C70 have been analyzed by Raman spectroscopy in the solid state and complemented with the analysis of their spectroscopic responses under mechanical and thermal stresses. By following the frequency behaviour of the G and RBM modes we have found that [10]CPP in the [10]CPP@C70 complex displays a more “ordered” structure. However, in [11]CPP@C70, the nanoring becomes oval-shaped with closer contacts with the C70 poles and less conformational restriction in the flattened region. By mechanical and thermal stresses we are able to modify the lying conformation of [10]CPP@C70 towards a standing orientation. [11]CPP@C70 resists pressure changes, although it tends to shift from the standing to the lying orientation by heating. As for the crystal cell, the [n]CPPs occupy the residual empty spaces while the main crystallographic positions are reserved for C70. These are new examples of the impressive adaptability of the [n]CPP molecules to different physico-chemical environments, a chameleon-like property which reveals the delicate equilibrium provided by cyclic conjugation and ring strain.

Raman spectroscopy and X-ray diffraction of lithium niobate at temperatures up to 1300○-4.80pt○C

2005 ◽  
Vol 126 ◽  
pp. 101-105 ◽  
Author(s):  
B. Moulin ◽  
L. Hennet ◽  
D. Thiaudière ◽  
P. Melin ◽  
P. Simon
Keyword(s):  
Raman Spectroscopy ◽  
Lithium Niobate ◽  
X Ray Diffraction ◽  
X Ray

Raman spectroscopy using a gas laser

1965 ◽  
Vol 26 (11) ◽  
pp. 620-626 ◽  
Author(s):  
J.P. Russell
Keyword(s):  
Raman Spectroscopy ◽  
Gas Laser

OBSERVATION OF PRETRANSITIONAL EFFECTS ON THE SHAPE OF THE E2 (17 cm-1 ) OPTICAL MODE IN β-Ag1 BY RAMAN SPECTROSCOPY

1981 ◽  
Vol 42 (C6) ◽  
pp. C6-776-C6-778
Author(s):  
E. Cazzanelli ◽  
A. Fontana ◽  
G. Mariotto ◽  
F. Rocca ◽  
M. P. Fontana
Keyword(s):  
Raman Spectroscopy ◽  
Optical Mode

RAMAN SPECTROSCOPY IN GUIDED OPTICAL WAVES

1983 ◽  
Vol 44 (C10) ◽  
pp. C10-501-C10-503 ◽  
Author(s):  
J. D. Swalen ◽  
J. F. Rabolt
Keyword(s):  
Raman Spectroscopy ◽  
Optical Waves

A POWERFUL TOOL TO STUDY COLLISIONAL PHENOMENA AND FOR COMBUSTION APPLICATIONS : THE HIGH RESOLUTION STIMULATED RAMAN SPECTROSCOPY

1987 ◽  
Vol 48 (C7) ◽  
pp. C7-761-C7-762
Author(s):  
B. LAVOREL ◽  
G. MILLOT ◽  
R. SAINT-LOUP ◽  
M. L. GONZE ◽  
J. SANTOS ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
High Resolution ◽  
Stimulated Raman

Raman Spectroscopy: A New Tool for the “Skull Base” Surgeon?

Skull Base ◽  
2009 ◽  
Vol 19 (01) ◽  
Author(s):  
S. Koljenovic ◽  
T.C. Schut ◽  
A.J.P.E. Vincent ◽  
J.M. Kros ◽  
G.J. Puppels
Keyword(s):  
Raman Spectroscopy ◽  
Skull Base
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