Evan Perez’s research while affiliated with University of Utah and other places

... Article likely due to oxidation of NA. 20 Yet, a simultaneous growth of a negative absorption band at 1704 cm −1 , also attributed to the stretching mode of C�O functional groups, indicates a loss of mass due to fractionation or decarboxylation of the complex sample, leading to VOC and CO 2 formation. 33,55,56 Slight positive absorptions at 1404 and 1370 cm −1 , corresponding to the bending modes of aldehydic C−H and O−H product functional groups, further support these observations. 20 These simultaneous processes of oxidation and decarboxylation offset one another, resulting in no measurable mass change in the QCM. Figure 7B shows the vibrational spectroscopy results of 1:5 m-DOM/NA thin film, where distinct features of oxygenated product formation are identified. ...

Reference:

Photooxidation of Nonanoic Acid by Molecular and Complex Environmental Photosensitizers

... eV lower than the experiment, whereas MP2 is about 0.5 eV too high. The D 0 (SmO + ) values given by MP2 and CCSD(T) are about 0.4 eV under the experimental value of Lachowicz et al. 7 Combined, these discrepancies lead to CCSD(T) reproducing the enthalpy of reaction 4 ΔrH 4 better than the MP2 method (∼0.25 vs ∼0.59 e V lower than the experiment, respectively). The prediction of the energy difference between the ground state and the first excited state of Sm + , E(Sm + , 6 F), is accurately predicted by both MP2 and CCSD(T). ...

Reference:

Kinetic energy dependence and potential energy surface of the spin-forbidden reaction Sm (F) + N2O (Σ) → SmO (Δ) + N2 (Σg)

... The À OH peak (3450 cm À 1 ) of the chiral ligand disappeared in the Raman spectrum, confirming its participation in the reaction. [11] The powder X-ray diffraction patterns showed two clear peaks at 36.1 and 44.7 eV ( Figure S4a). This indicates that chiral Ag 2 Se:Nd/Yd/Er NPs had a body-centered cubic phase structure (JCPDS No. 27-0619). ...

Reference:

Enantiomeric NIR‐II Emitting Rare‐Earth‐Doped Ag2Se Nanoparticles with Differentiated In Vivo Imaging Efficiencies

... In this Feature Article, the advantages of these techniques are discussed. In defining the scope of this perspective, IR PD techniques-such as infrared multiphoton photodissociation (IRMPD) [18][19][20][21][22][23][24][25] and infrared photodissociation (IRPD) [26][27][28][29][30] -and m/z selected photoelectron (PE) spectroscopy [31][32][33][34] are not included in detail, with the exception of select examples. The interested reader is directed to these aforelisted references. ...

Reference:

Laser Photodissocation, Action Spectroscopy and Mass Spectrometry Unite to Detect and Separate Isomers

... Jestilä J. S. et. al [53] showed that such intermediates have different structures and length of M-O bonds. It was shown that the stronger interactions of Li, Na, and K with the oxygens in the oxalate fragment could lead to the elongation of the C-C bond, and, probably, its faster rupture during FeC 2 O 4 decomposition. ...

Reference:

Revealing the Mechanism and Kinetics of Fe5C2 Formation From Ferrous Oxalate under CO2 Fischer‐Tropsch Conditions Using Time‐Resolved In Situ X‐Ray Absorption Spectroscopy

... [33] By coupling it with infrared photodissociation (IRPD) spectroscopy, we can characterize the structure of the intermediates in a controlled environment free from external interference. [34][35][36][37][38] This approach has already yielded molecular-level insights into reactive intermediates in electrocatalytic O 2 and CO 2 reduction reactions. [32,39,40] Here, we apply VESI-MS to investigate the reaction mechanism of homogeneous electrocatalytic ammonia oxidation by [Ru II (NH 3 ...

Reference:

Mapping the Catalytic Cycle of Ru‐Catalyzed Ammonia Oxidation

... The process is reminiscent of the fragmentation pathway by loss of an acetyloxyl radical from a gaseous uranyl complex, thus undergoing reduction from U VI O 2 2+ to U V O 2 + [60]. The formation of reduced species after CID activation has indeed been reported in the breakdown behavior of deprotonated uranyl-containing complexes [61][62][63], while the corresponding protonated species showed no tendency to undergo reduction reactions [62]. ...

Reference:

Elusive Intermediates in the Breakdown Reactivity Patterns of Prodrug Platinum(IV) Complexes

... Perez et al., 2016). The uranyl acetate complex [U VI O 2 (O 2 CCH 3 ) 3 ] − , formed the [U V O 2 (CH 3 ) (O 2 CCH 3 )] − complex after two rounds of CID. ...

Reference:

Ion‐molecule reactions of mass‐selected ions

... More recent experiments by our group have demonstrated that the 2-D, linear ion trap (LIT) can provide access to fragmentation pathways and reactions not observed in earlier studies with 3-D ion traps [51][52][53][54][55]. For example, our past studies of the dissociation behavior of gas-phase actinyl complexes using a 3-D ion trap were complicated by high yields of product ions obviously generated by collisions with background H 2 O. Relatively high levels of H 2 O in the ion trap (ca. 10 −6 Torr) create hydrated ions or lead to charge reduction reactions that form products such as [U VI O 2 (OH)] + and [U V O 2 ] + and larger hydrated complexes containing these cations [6,7,43]. ...

Reference:

Influence of Background H2O on the Collision-Induced Dissociation Products Generated from [UO2NO3]+