Isomer-separated photodissociation of large sized silicon and carbon cluster ions: Drift tube experiment combined with a tandem reflectron mass spectrometer for Si 24 + – Si 27 + and C 32 + –C 38 +

Moriyama, Ryoichi; Ohtaki, T.; Hosoya, Jun; Koyasu, Kiichirou; Misaizu, Fuminori

doi:10.1140/epjd/e2012-30535-0

Cited by 8 publications

(10 citation statements)

References 38 publications

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“…Linear and cyclic isomers also decompose to different sized photofragments when exposed to 266 and 355 nm light. 10,11 The preference of mid-sized C + n (n=10-18) clusters for cyclic rather than linear structures is consistent with electronic structure calculations. 12 Spectroscopic studies of carbon cluster cations have mainly been restricted to species with fewer than ten carbon atoms, including C + 6 -C + 9 , 13,14 and the larger C + 60 and C + 70 fullerenes.…”

Section: Introductionsupporting

confidence: 73%

Electronic spectra of positively charged carbon clusters—C2n+ (n = 6–14)

Buntine

Cotter

Jacovella

et al. 2021

The Journal of Chemical Physics

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Electronic spectra are measured for mass-selected C2n+(n = 6–14) clusters over the visible and near-infrared spectral range through resonance enhanced photodissociation of clusters tagged with N2 molecules in a cryogenic ion trap. The carbon cluster cations are generated through laser ablation of a graphite disk and can be selected according to their collision cross section with He buffer gas and their mass prior to being trapped and spectroscopically probed. The data suggest that the C2n+(n = 6–14) clusters have monocyclic structures with bicyclic structures becoming more prevalent for C22+ and larger clusters. The C2n+ electronic spectra are dominated by an origin transition that shifts linearly to a longer wavelength with the number of carbon atoms and associated progressions involving excitation of ring deformation vibrational modes. Bands for C12+, C16+, C20+, C24+, and C28+ are relatively broad, possibly due to rapid non-radiative decay from the excited state, whereas bands for C14+, C18+, C22+, and C26+ are narrower, consistent with slower non-radiative deactivation.

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Section: Introductionsupporting

confidence: 73%

Electronic spectra of positively charged carbon clusters—C2n+ (n = 6–14)

Buntine

Cotter

Jacovella

et al. 2021

The Journal of Chemical Physics

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“…The microplasma containing carbon vapor produced by laser vaporization was cooled by He gas expanded from a pulsed valve with a stagnation pressure of 0.3 MPa. The carbon cluster ions grew in a channel (20 mm long; 3 mm inner diameter) of the cluster source to enhance the collisions and generate larger clusters than those generated in a previous study of small carbon clusters . Cluster ions were injected into the ion-drift cell by a pulsed electric field with 50 V potential difference at a given time ( t = t 0 ).…”

Section: Experimental and Theoretical Methodsmentioning

confidence: 99%

“…The carbon cluster ions grew in a channel (20 mm long; 3 mm inner diameter) of the cluster source to enhance the collisions and generate larger clusters than those generated in a previous study of small carbon clusters. 38 Cluster ions were injected into the ion-drift cell by a pulsed electric field with 50 V potential difference at a given time (t = t 0 ). Therefore, the injection energy of monocation was 50 eV, and that of dication was 100 eV.…”

Section: Experimental and Theoretical Methodsmentioning

confidence: 99%

Small Carbon Nano-Onions: An Ion Mobility Mass Spectrometric Study

Moriyama

Nakano

et al. 2018

J. Phys. Chem. C

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Structures and charges of nanocarbon cluster ions, C n z+ (100 ≤ n ≤ 800, z = 1 and 2), have been determined using ion mobility mass spectrometry. For singly charged ions, a compact cluster ion series was observed in addition to monolayer fullerene ions for n = 260−700 continuously. Previous electron microscopic observations indicated that the compact clusters were bilayer fullerenes (nano-onions), in which the inner and outer layers grow from a structure close to [C 30 @C 230 ] + at n = 260. The present study also suggests that several combinations of inner and outer layer fullerenes were produced. The results indicated that the interlayer distance depended on different combinations of inner and outer layers and that the observed lower limit of the interlayer distance agreed well with that of graphite (3.35 Å). The upper limit corresponded to bilayer structures in which the number of atoms of the inner layer was constant at about 30, the smallest fullerene size observed in this study. Series of monolayers and compact bilayers of doubly charged ions with cross sections that coincided with those of monocations were observed in nearly the same size region as monocations.

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“…IM-MS experiments were performed using a home-built vacuum apparatus composed of a cluster ion source, an ion-drift cell for IMS, and a reflectron time-of-flight mass spectrometer (TOFMS). Details of the experimental setup and procedures for IM-MS were already reported elsewhere. ,,− Iron oxide cluster cations, Fe m O n + , were generated by a combination of laser vaporization of an iron rod and supersonic expansion of 0.5% O 2 /He mixture gas. Stagnation pressure of the mixture gas was 2 atm.…”

Section: Experimental and Computational Methodsmentioning

confidence: 99%

Isomer Separation of Iron Oxide Cluster Cations by Ion Mobility Mass Spectrometry

et al. 2014

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Geometrical structures of iron oxide cluster cations have been analyzed by ion mobility mass spectrometry. The series of (FeO)n(+) and FenOn + 1(+) cluster cations were predominantly observed in a mass spectrum at high ion-injection energy into a drift cell. Arrival time distributions in the ion mobility spectrometry indicate that two structural isomers coexist for the (FeO)n(+) clusters at n ≥ 5. By comparison of experimental collision cross sections determined from the arrival times with theoretical ones, two-dimensional ring and sheet structures were assignable for (FeO)n(+) (n = 3-8). In addition to these isomers, compact three-dimensional structures were also found to be stable at (FeO)n(+) (n ≥ 6). Thus, the two-dimensional and three-dimensional structural isomers coexist for (FeO)n(+) (n = 6-8).

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Isomer-separated photodissociation of large sized silicon and carbon cluster ions: Drift tube experiment combined with a tandem reflectron mass spectrometer for Si 24 + – Si 27 + and C 32 + –C 38 +

Cited by 8 publications

References 38 publications

Electronic spectra of positively charged carbon clusters—C2n+ (n = 6–14)

Electronic spectra of positively charged carbon clusters—C2n+ (n = 6–14)

Small Carbon Nano-Onions: An Ion Mobility Mass Spectrometric Study

Isomer Separation of Iron Oxide Cluster Cations by Ion Mobility Mass Spectrometry

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