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1. Experimental and theoretical investigations of infrared multiple photon dissociation spectra of arginine complexes with Zn ²⁺ and Cd ²⁺

   https://doi.org/10.1039/c8cp03484b  

   Chalifoux, Aaron M.; Boles, Georgia C.; Berden, Giel; Oomens, Jos; Armentrout, P. B. (January 2018, Physical Chemistry Chemical Physics)

   Arginine (Arg) complexes with Zn 2+ and Cd 2+ were examined by infrared multiple photon dissociation (IRMPD) action spectroscopy using light from a free electron laser. Electrospray ionization generated complexes of deprotonated Arg with Zn 2+ , [Zn(Arg–H)] + , and Arg with CdCl + , CdCl + (Arg). Possible low-energy conformers of these species were found using quantum chemical calculations, and their calculated IR spectra were compared to experimentally measured IRMPD spectra. Calculations were performed at the B3LYP/6-311+G(d,p) level for Zn 2+ complexes and B3LYP/def2-TZVP with an SDD effective core potential on cadmium for CdCl + complexes. [Zn(Arg–H)] + was found to adopt a charge-solvated, tridentate [N,CO − ,N ω ′] structure where Zn 2+ binds to the backbone amine, carbonyl oxygen, and side-chain terminal guanidine nitrogen (N ω ′). The CdCl + (Arg) species was suggested to be a mixture of a dominant (∼85%) charge-solvated, tridentate [N,CO,N ω ′] structure where the CdCl + binds to the backbone amine, carbonyl, and side-chain imine (N ω ′) and a minor (∼15%) bidentate [N,CO − ](N ω ′H 2 + ) zwitterionic structure where the metal center binds to the backbone amine and carbonyl oxygen with intramolecular proton migration from the hydroxyl to the N ω ′ guanidine nitrogen (as designated in parenthesis). 

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2. Experimental and theoretical investigations of infrared multiple photon dissociation spectra of lysine complexes with Zn ²⁺ and Cd ²⁺

   https://doi.org/10.1177/1469066718792902  

   Owen, Cameron_J; Boles, Georgia_C; Berden, Giel; Oomens, Jos; Armentrout, PB (December 2018, European Journal of Mass Spectrometry)

   The gas-phase structures of zinc and cadmium complexes of lysine (Lys) are investigated via a combination of infrared multiple photon dissociation action spectroscopy and ab initio quantum chemical calculations. In order to unambiguously identify the experimentally observed species, [Zn(Lys−H)]⁺and CdCl⁺(Lys), the action spectra were compared to linear absorption spectra calculated at the B3LYP level of theory, using 6-311+G(d,p) and def2-TVZP basis sets for the zinc and cadmium systems, respectively. Single point energies were also calculated at the B3LYP, B3P86, MP2, and B3LYP-GD3BJ (accounting for empirical dispersion) levels of theory using larger basis sets. Identification of the experimentally formed isomers is possible through good agreement between infrared multiple photon dissociation action spectra and the theoretically predicted spectra. The [Zn(Lys−H)]⁺complex adopts a tridentate orientation involving the amino acid backbone amine and deprotonated carboxylic acid groups as well as the side-chain amine group, [N_α,CO⁻,N_ɛ]. The CdCl⁺(Lys) complex similarly adopts a tridentate chelation involving the amino acid backbone amine and carbonyl groups, as well as the side-chain amine group, [N_α,CO,N_ɛ]. In both cases, the identified complexes are the lowest energy gas-phase structures at all levels of theory. 

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3. Experimental and Theoretical Investigations of Infrared Multiple Photon Dissociation Spectra of Aspartic Acid Complexes with Zn ²⁺ and Cd ²⁺

   https://doi.org/10.1021/acs.jpcb.8b00801  

   Boles, Georgia C.; Hightower, Randy L.; Coates, Rebecca A.; McNary, Christopher P.; Berden, Giel; Oomens, Jos; Armentrout, P. B. (April 2018, The Journal of Physical Chemistry B)
4. Revealing the Surface Structure of CdSe Nanocrystals by Dynamic Nuclear Polarization-Enhanced ⁷⁷ Se and ¹¹³ Cd Solid-State NMR Spectroscopy

   https://doi.org/10.1021/jacs.1c03162  

   Chen, Yunhua; Dorn, Rick W.; Hanrahan, Michael P.; Wei, Lin; Blome-Fernández, Rafael; Medina-Gonzalez, Alan M.; Adamson, Marquix A.; Flintgruber, Anne H.; Vela, Javier; Rossini, Aaron J. (January 2021, Journal of the American Chemical Society)

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5. Rapid Simultaneous Removal of Toxic Anions [HSeO ₃ ] ⁻ , [SeO ₃ ] ^2– , and [SeO ₄ ] ^2– , and Metals Hg ²⁺ , Cu ²⁺ , and Cd ²⁺ by MoS ₄ ^2– Intercalated Layered Double Hydroxide

   https://doi.org/10.1021/jacs.7b07123  

   Ma, Lijiao; Islam, Saiful M.; Xiao, Chengliang; Zhao, Jing; Liu, Hongyun; Yuan, Mengwei; Sun, Genban; Li, Huifeng; Ma, Shulan; Kanatzidis, Mercouri G. (September 2017, Journal of the American Chemical Society)