分析化学

The core task of this step is to select a specific chemical research system and design a complete experimental or computational plan, laying a scientific foundation for subsequent work. Select representative research objects according to course characteristics (such as organic synthesis target molecules, inorganic complex systems, analytical samples, or quantum chemical calculation systems), and clarify research objectives and key scientific questions. The plan design must comprehensively consider feasibility, safety, and scientific rigor, reflecting the methodological thinking of chemical research.

• Review relevant textbooks and professional literature (ACS, RSC, Wiley databases) to understand the latest progress in the research field, and determine specific research objectives and expected outcomes
• Design a complete technical route: including synthesis/analysis/computation plan, required reagents and instruments, key operation steps, and quality control measures, and draw an experimental flowchart
• Conduct feasibility analysis and safety assessment: identify experimental risk points, develop safety protection measures and emergency plans, and ensure safe and standardized experimental operations

The core task of this step is to conduct in-depth theoretical analysis of the research system using basic chemical principles, revealing the microscopic mechanism of reactions or processes. Understand the essence of chemical phenomena at the atomic and molecular level, including core issues such as bond formation and breaking, electron transfer, and energy changes. Theoretical analysis provides theoretical guidance for experimental design and result interpretation.

• Apply basic chemical principles (bond theory, thermodynamics, kinetics, quantum chemistry) to analyze the research system, establish theoretical models, and clarify reaction mechanisms or action mechanisms
• Perform necessary theoretical calculations: use quantum chemistry software such as Gaussian, VASP, ORCA or tools like ChemDraw and Origin to predict possible reaction pathways and product structures
• Review classic literature and textbooks, compare evidence for different mechanisms, propose research hypotheses and expected results, and provide theoretical basis for experimental verification

The core task of this step is to complete chemical experiments or calculations according to the designed plan, and systematically collect raw data. The experimental process must strictly control conditions to ensure data reliability and reproducibility. Record all operation parameters and phenomena in detail to ensure traceability of the experimental process. Special attention should be paid to safe operation and standardized recording in chemical experiments.

• Experimental preparation: purify reagents, calibrate instruments, set up experimental apparatus, conduct preliminary experiments to verify method feasibility, and ensure stable and reliable experimental conditions
• Formal experiments: operate strictly according to the experimental plan, control reaction conditions (temperature, pressure, concentration, time), and repeat each experiment at least 3 times to test reproducibility
• Data and phenomenon recording: use an experiment notebook to systematically record all raw data, spectra, experimental phenomena, and abnormal situations, and retain original data files

The core task of this step is to conduct systematic structural characterization and performance testing on synthesized products or analytical samples, verifying the correctness of target products and their performance advantages. Use multiple characterization methods to mutually confirm and ensure the reliability of structural identification. Performance testing should be performed under standard conditions to ensure comparability of test results.

• Structural characterization: comprehensively use NMR (1H, 13C, 2D), MS, IR, UV-Vis, X-ray diffraction and other methods to determine product structure, with at least two methods for mutual verification
• Performance testing: measure relevant performance according to research objectives (catalytic activity, fluorescence quantum yield, electrochemical performance, biological activity, etc.), and set up control experiments
• Data processing: use software such as MestReNova and Origin to process spectra and data, draw standardized charts, and perform necessary statistical analysis

The core task of this step is to conduct in-depth analysis and discussion of experimental results and write a standardized chemical research report. Combine theoretical and experimental results to reveal the laws and mechanisms behind chemical phenomena. The research report must conform to academic standards, with clear data charts and rigorous argumentation logic.

• Result discussion: in-depth analysis of experimental results, combined with theoretical calculations and literature reports, explain reaction mechanisms or structure-activity relationships, and discuss abnormal phenomena and sources of experimental error
• Report writing: write the report according to chemical academic paper standards, including abstract, introduction, experimental methods, results and discussion, conclusions, references, with standardized citation format (ACS style)
• Outcome summary: summarize the main findings and innovations of the research, analyze limitations of the study, and propose future research directions and improvement suggestions