Publication
Ion Spectroscopy Reveals Structural Difference for Proteins Microhydrated by Retention and Condensation of Water
Publications associées (76)
Raman Characterization of the Charge Density Wave Phase of 1T-TiSe2: From Bulk to Atomically Thin Layers
Klaus Kern, Marko Burghard, Alexander Ronald Hoyer
Raman scattering is a powerful tool for investigating the vibrational properties of two-dimensional materials. Unlike the 2H phase of many transition metal dichalcogenides, the 1T phase of TiSe2 features a Raman-active shearing and breathing mode, both of ...
Amer Chemical Soc2017Exploring the relevance of gas-phase structures to biology: cold ion spectroscopy of the decapeptide neurokinin A
Linking the intrinsic tertiary structures of biomolecules to their native geometries is a central prerequisite for making gas-phase studies directly relevant to biology. The isolation of molecules in the gas phase eliminates hydrophilic interactions with s ...
Royal Society of Chemistry2017Gas-phase probes of kinetically trapped peptides
Gas-phase techniques are promising for studying intrinsically disordered peptides and proteins, as they can be implemented in a conformer-selective way. One of the issues that prevent them from finding a broader use is the question of to which extent the s ...
EPFL2016UV and IR Spectroscopy of Cold H2O+-Benzo-Crown Ether Complexes
Thomas Rizzo, Yoshiya Inokuchi
The H2O+ radical ion, produced in an electrospray ion source via charge transfer from Eu3+, is encapsulated in benzo-15-crown-5 (B15C5) or benzo-18-crown-6 (B18C6). We measure UV photodissociation (UVPD) spectra of the (H2O·B15C5)+ and (H2O·B18C6)+ complex ...
American Chemical Society2015Spectroscopic studies of kinetically trapped conformations in the gas phase: the case of triply protonated bradykinin
Thomas Rizzo, Liudmila Voronina
Understanding the relation between the gas-phase structure of biological molecules and their solution-phase structure is important when attempting to use gas-phase techniques to address biologically relevant questions. Directly after electrospray ionizatio ...
Royal Soc Chemistry2015Functional group distribution of secondary organic aerosol generated using the Master Chemical Mechanism: similarities and discrepancies with environmental controlled chamber studies
Satoshi Takahama, Giulia Ruggeri, Fabian Alexander Bernhard, Sarah Elizabeth Shipley
In this work, composition of organic aerosol simulated by the Master Chemical Mechanism coupled with a dynamic absorptive partitioning model is compared against infrared spectroscopy measurements of functional group abundance in chamber experiments. The Ma ...
2015Solvent Effects on the Encapsulation of Divalent Ions by Benzo-18-Crown-6 and Benzo-15-Crown-5
Thomas Rizzo, Yoshiya Inokuchi
We measure UV photodissociation (UVPD) spectra of cold benzo-15-crown-5 (B15C5) and benzo-18-crown-6 (B18C6) complexes with divalent ions (M2+ = Ca2+, Sr2+, Ba2+, and Mn2+), solvated with an H2O or a CH3OH molecule: M2+·B15C5·H2O, M2+·B15C5·CH3OH, M2+·B18C ...
American Chemical Society2015Conformational Structures of a Decapeptide Validated by First Principles Calculations and Cold Ion Spectroscopy
Thomas Rizzo, Vladimir Kopysov, Natalia Nagornova, Robert Benny Gerber
Calculated structures of the two most stable conformers of a protonated decapeptide gramicidin S in the gas phase have been validated by comparing the vibrational spectra, calculat- ed from first- principles and measured in a wide spectral range using infr ...
Wiley-V C H Verlag Gmbh2015Operando Attenuated Total Reflectance FTIR Spectroscopy: Studies on the Different Selectivity Observed in Benzyl Alcohol Oxidation
Au, Pd, and AuPd supported on TiO2 were prepared by a sol immobilization route. Operando attenuated total reflectance (ATR) IR spectroscopy and catalytic batch reactor experiments were performed in parallel to elucidate the different catalytic performance ...
Wiley-V C H Verlag Gmbh2015Dynamics of UV-excited, protonated peptides in the gas phase
The scope of this thesis is the electronically excited state dynamics of protonated peptides and their photofragmentation mechanism. UV radiation induces fragmentation of biological molecules and might cause various diseases, such as cataracts or skin canc ...
EPFL2014