Chemistry Resource Book

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TheChemistry Resource Centers (CRC) at Xavier University of Louisiana are a free academic resource for students to better their understanding of General Chemistry and Organic Chemistry. This service is provided free by scheduling appointments through the EAB Navigate App or web-based browser. Walk-ins will be accepted if a tutor is available.

The sole duty of the resource room staff is to help students learn general chemistry. We are here to make sure that everything associated with teaching goes smoothly. When you have questions, bring them to any of us. When we are busy it may be a moment before we have time to speak with you, but you will have our full attention when your turn comes.

Graduate TAs give priority to the students in their course but will also assist with other chemistry courses when time is available. Other resources available in the room are student computers, alternate textbooks, and modeling kits.

The Biological Chemistry Resource Center (BCRC) at the Department of Chemistry provides an open access user facility for state-of-art biophysical analytical instrumentation. The goal of the center is not only to provide access to instrumentation, but also supply the graduate student and postdoctoral scholar user community with a firm understanding of the scientific principles behind the techniques and on-site expertise to ensure successful experimentation. Instrumentation access will be available to the entire University of Pennsylvania research community. For more information regarding instrumentation access and services contact us at bcrc-ch...@sas.upenn.edu.

CEM Liberty 1 automated microwave system: The Liberty 1 is used to synthesize custom peptides at scales up to 500 moles. The microwave-assisted synthesis gives high purity products, a distinct advantage for long or complex sequences. It is complemented by the Accent cleavage station unit, to allow fast work-up after synthesis.

Bruker Ultraflex III matrix-assisted laser desorption/ionization time-of-flight mass spectrometer (MALDI-TOF/TOF MS): The MALDI-TOF is used to characterize molecular weights of labeled and unlabeled peptides, proteins as well as nucleic acids. It has an acquisition rate of 1 s/sample, and only requires a volume of 1 L/sample.

Aviv circular dichroism (CD) spectrometer: The Aviv CD spectrometer is capable of performing wavelength scans and thermal denaturation studies from 190 to 800 nm. It is also equipped with an extension unit to measure both CD signals and fluorescence signals at the same time, and a titrator unit. It is used to characterize the structure and folding properties of peptides, proteins, and nucleic acids.

Tecan Infinite M1000 multi-mode and F200 fluorescence polarization plate readers: The M1000 plate reader can simultaneously read absorbance and fluorescence/luminescence with wavelength scanning, and the F200 can read fluorescence polarization at a two wavelengths. Both systems can perform 96 or 384 well scans in less than a min.

GE Life Sciences MicroCal 200 isothermal titration calorimeter (ITC): The ITC system provides a direct measurement of binding enthalpy (and indirectly, entropy) between a protein of interest and a peptide, nucleic acid, small molecule ligand, or lipid vesicle in a label-free platform. It can also be used to characterize labeled proteins in comparison to the native protein.

KinTek AutoSF120 stopped flow spectrometer: The AutoSF120 unit is capable of simultaneously measuring fluorescence and absorbance for wavelengths ranging from 180 nm to 800 nm at the ms scale. It is equipped with an automatic sample loader to allow high-throughput experiments from a 96 well plate. It is used to characterize fast binding or enzymatic processes that cannot be resolved on a standard fluorometer.

GE Life Sciences Typhoon FLA7000 gel imager: The Typhoon imager has phosphorescent and fluorescent/luminescent imaging modes, in addition to typical Coomassie stain imaging. It has a built-in program for analysis and quantification, and is frequently used to characterize fluorescently labeled peptides and proteins.

Protein production equipment: Instruments include four super-speed centrifuges (30,000-100,000 rpm) for cell pelleting and protein isolation, one small benchtop centrifuge for rapid buffer exchange, one static incubator for bacteria culture, two incubators with shaking and temperature control from 4 to 65 C, and one sonicator for cell lysis. These instruments are capable of sustaining protein production and purification at up to 2 L culture scale.

Labconco lyophilizer: The lyophilizer unit removes water and organic solvents using a sublimation process, for the recovery of peptides and small molecules after purification. It has 12 ports that can handle as many as 50 bulk samples simultaneously.

Cell culture facility: Includes two biosafety cabinets and four CO2 atmosphere incubators for routine mammalian cell culture. It is commonly used to assess the biological activity of organic compounds or labeled proteins.

The Computational Chemistry Instructional Laboratory (CCIL), located in Room 232 of the Chemistry Building, provides computer access to all undergraduate and graduate students enrolled in UNT chemistry courses. Computers are to be used only for chemistry related work and instruction. CCIL is not a General access lab

Large-enrollment courses and chemistry labs can be intimidating, but the Chemistry Department has a vibrant LA Program to make sure that you get the help you need, both inside and outside of the classroom. LAs assist with in-class group questions, clicker questions, and other activities. Take advantage of their expertise during class to enhance your learning experience.

Penn State Learning: Find on-campus collaborative learning via peer tutoring, guided study groups, and team project work spaces. Support is available for some lower level subject areas including biology, chemistry, mathematics, physics, statistics, and astronomy.

If you wish to provide feedback, there are links available for the organic resources all the time; for the introductory chemistry courses a link near the end of the semester will be provided. We always appreciate feedback so thank you in advance!

Graduate teaching assistants hold office hours for their courses in the Chemistry Resource Center. These instructors are available to assist students in their chemistry courses. Students utilize this room to prepare for exams, request help on homework, work on laboratory reports and general study for chemistry.

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Recent advances in quantum computing devices have brought attention to hybrid quantum-classical algorithms like the variational quantum eigensolver (VQE) as a potential route to practical quantum advantage in chemistry. However, it is not yet clear whether such algorithms, even in the absence of device error, could actually achieve quantum advantage for systems of practical interest. We have performed an exhaustive analysis to estimate the number of qubits and number of measurements required to compute the combustion energies of small organic molecules and related systems to within chemical accuracy of experimental values using the VQE. We consider several key modern improvements to the VQE, including low-rank factorizations of the Hamiltonian. Our results indicate that, although these techniques are useful, they will not be sufficient to achieve practical quantum computational advantage for our molecular set, or for similar molecules. This suggests that novel approaches to operator estimation leveraging quantum coherence, such as enhanced likelihood functions, may be required.

Top: Error relative to CCSD(T)/AV5Z for the FNO method using the FNO threshold for truncation and frozen core orbitals. Bottom: Largest number of qubits per active electrons that would be needed to compute the combustion energy for each molecule in the given active space. Perturbation theory correction is included in the results (see Supplemental Material [45]).

Values of K computed for molecules in our benchmark set using QWC grouping (blue) and basis rotation grouping (orange). The top row approximates variances with CISD density matrices and the bottom row sets variances to their upper bounds. Covariances are set to zero in both cases. The left column represents the Hamiltonians in the canonical orbital basis and the right column in the FNO basis. A power law is fit through the data for each grouping method and the obtained exponent is reported next to the curve.

Values of K computed for various molecules with no grouping (crosses), QWC grouping (squares), and basis rotation grouping (circles), both with (orange) and without (blue) RDMC. Eight qubit data freeze six electrons for CH4 and H2O; others only freeze core electrons. Hamiltonians were represented with FNOs in the AVTZ basis set and variances estimated from CISD.

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