Chemistry is not a science that studies the nature, composition, structure and its changing laws of matter at the molecular and atomic levels. Seeing this sentence is really abstract. Anyway, chemistry is the study of the micro-world, which is invisible and intangible. At ordinary times, the teacher said that there is a dynamic three-dimensional diagram with electronic equipment. Sometimes, just look at the plan on the blackboard and the static stereogram on the book, and there is only one positive one. In a word: imagine yourself.
How did the art problem come to chemistry? Let's assume for a moment that a teacher is not good at drawing and seldom draws in the process of chemistry teaching. When he needed to draw, he began to use the most commonly used technique in Chinese: metaphor, indeed, close to life. Who will say that one day you can only read things in books, and students rarely really know what it is, only what it looks like, and even some people don't even have some ordinary instruments when they get to college?
Let's assume the second one: a teacher draws beautifully, but he has one disadvantage, that is, he draws a little slowly. Every student knows a few knowledge points in a class, but it is unfair to the students who study well. Moreover, if the progress can't keep up, many knowledge students won't really understand, and there is no need to repeat other questions.
Therefore, in the teaching process, teachers are not only required to draw beautiful images, but also to be fast and efficient. However, it is impossible to master them in a short time. Even if they do, they rarely fail to draw those complicated structures.
In the face of difficulties, there are always some' whimsical' people who want to solve this problem, but they really solved it. From then on, teachers no longer have to worry about drawing, efficiency and students' understanding. Although these tools are not perfect, they are enough for the present chemistry teaching.
Today I'm going to introduce four chemical tools:
I. Diamond 3.0
Two. Chemical drawing
Three. Chemical window
Four. Automatic call distributor/chemical sketch
First: diamond software: it is a chemical professional application software developed by Crystal Impact GbR Company of Bonn University, Germany. It is mainly used to draw and explore the crystal structure, and can also be used to show the material characteristics of molecular structure and material science.
1. The main function of diamond in chemical education.
(1) Construct the crystal structure accurately.
(2) Displaying the crystal vividly is convenient for observing the crystal structure from all directions. Can be done on the product.
(3) Marking and beautification.
(4) The bonding length, bonding angle and torque of the product can be measured.
(5) By learning this software, you can learn more about the crystal structure. You can put the product body.
(6) The motion process of the structure is animated and saved as an AVI file.
Two. Introduction of special functions
(1) Animate the crystal structure.
(2) Set the material and corresponding color background for the crystal structure.
(3) Watch the molecular structure in Diamond software.
2.。 The basic steps for Diamond to build a crystal model:
1. Determine the crystal model to be built.
2. Collect data (find the cell parameters of the crystal and the coordinate parameters of the atoms in the crystal).
3. Modeling in Diamond software (enter relevant data in each dialog box)
4. Modify, beautify, mark and observe the crystal model in the operation scene of diamond software.
5. On-site teaching or exporting three-dimensional files (pictures or web pages) of crystal models.
Three. Introduction of special functions
(1) Animate the crystal structure.
(2) Set the material and corresponding color background for the crystal structure.
(3) Watch the molecular structure in Diamond software.
Secondly, as one of the core tools of ChemDraw, developed by CambridgeSoft, USA, provides a complete and easy-to-use drawing solution for scientists, including drawing chemical structures and reactions, and can obtain corresponding attribute data, system naming and spectral data, which has become the first choice for many scientists.
1. Explain ChemDraw and its application in detail.
The main interface of ChemDraw introduces that ChenDraw is a component in Chemoffce, which can create and edit all chemical-related graphics. Can establish and edit various chemical equations, structural formulas, three-dimensional graphics, symmetrical graphics, trajectories, etc. , and can flip, rotate, scale, store, copy and paste the graphics.
2. Application steps
1. Understand the main gadgets.
(1) Menu bar: Contains command settings for manipulating ChemDraw application files and contents. Include file (f), edit (e) and view (v). "object (o)". Menus, such as structure (s), text (x), curve (c), color (l), window r(W) and help (h).
(2) The "File (F)" menu contains common functions such as opening, creating, saving, saving as printing, page setting, parameter setting and exiting.
(3) The "Edit (e)" menu includes common functions such as copying, pasting, cutting, selecting all, inserting charts and inserting objects.
(4) The main function of "View (V)" menu is to call corresponding toolbar panels (such as main T toolbar, common J toolbar, object toolbar, information window, etc.). ) when the user uses it.
(5) The menu of "Object (O)" mainly includes the functions of setting, arranging angle, scaling and rotation of common objects.
(6) The menu "Structure" contains the functions of setting atomic properties, bonding properties, checking and clearing structures, and name conversion.
(7) The "Text (X)" menu contains functions such as setting the font of the text, font and font size alignment.
(8) The menu "Curve (c)" covers some operations of users in the process of drawing structural formulas (such as general settings, dotted lines: bold, double lines, closed filling, gradient settings, etc. ).
(9) "Color (L)" is mainly used for color setting during drawing structure operation.
(10) The "Window (w)" menu covers the presentation forms of windows (such as tiling and cascading).
(1 1) Help (h) The Help page contains usage information and update information of the software.
2. Use on demand
Three. Special features (ultra version is special)
1. can predict the common physical and chemical properties of molecules, such as melting point and heat of formation.
2. Name the structure according to IUPAC principle.
3. Predict the chemical potential shift of protons and carbon 13, etc.
Because most of them have similar functions, we will introduce the special functions of the remaining two chemical tools.
Thirdly, ChemWindow(CW) was first published by Softshell Intern. Ltd. 1989. The main function of this software is to draw chemical molecular structural formulas and chemical graphs of various structures and shapes, and it has the editing function of chemical molecular graphs that other drawing software does not have.
Special function: (1) drawing chemical structure, chemical reaction formula and chemical experimental device.
(2) Spectral curve processing: Chromatogram, spectrogram, nuclear magnetic resonance diagram, mass spectrum diagram and other curves can be directly called for processing and labeling, and the spectrogram can be output in the format desired and required by users, or other application software such as Microsoft Word and PowerPoint can be called for convenient publication or reporting.
(3) Spectral interpretation tools: correlation between infrared spectrum, mass spectrum, nuclear magnetic resonance (NMR) spectrum and chemical structure.
Fourthly, ACDFREE V 1 1.0 is the free software in ACD/Labs series developed by ACD. It includes four modules: ACD/ChemSketch, ACD/3D Viewer, ACD/CHNMR Viewer and ACD/ChemBasic. ACDFREE V 1 1.0 is a free software in ACD/Labs series developed by ACD.
Special function: 1. Used to draw chemical structures and calculate their properties.
2. Drawing mode: used for text and image processing. Molecular characteristic model, estimate the following characteristics.
3.* Molecular weight * Composition percentage * Molar refractive index * Molar volume * Isoosmotic specific volume * Refractive index * Surface tension * Density * Dielectric constant * Polarity * Single isotope mass, nominal molecular weight and average molecular weight.
4. Support WinXp, Win2000 and Win2003.
Knowing these chemistry software, you don't have to worry about the' art' in chemistry, improve the teaching efficiency and let students have a more intuitive understanding of chemistry.