covalent bond是什么意思

网络释义

用法例句

This pa per mainly sums up the formation conditions of different type covalent bonds, it s effects on the quality of compounds and its change rule in element periodic ta ble.

无机化学中常见共价键有双电子σ键(包括σ配键)、双电子π键、单电子键、三电子键、离域π键、多中心键、反馈π键(包括d-pπ键、d-dπ键和π←dπ键)等。

The result showed that Si--Si covalent bond eAsts in the melt of eutectic and hyper--eutectic alloy and Sr has capability to weaken the coto bond.

结果表明，在共晶及过共晶的合金的液态结构中，存在着Si—Si共价键，Sr有削弱这些共价键的倾向。

Through analysis of four methods for estimation of the percentage of partial ionic property of the two elements in covalent bond,we found the way for estimation of partial ionic property as a new supplemenl to the method for estimation of the percentage of the partial ionic properties by the strength of electronega tivity.

通过对四种估算二元异原子共价键的离子性百分数的方法讨论，初步找到估算共价键的部分离子性的思路和方法。

It was found that the composites existed in the formation ofcovalent bonding between TiO_2 and polymer by infrared spectra.

红外普图（ＩＲ）分析了这种材料的化学构成，证明纳米ＴｉＯ２与高分子是以共价键的形式存在。

Compared with real molecule,the quantum dot molecule can be in the form of covalent bonding or ionic bonding between the two same (or different) quantum dots under different conditions.

采用推广的LCAO方法和有限元方法计算了两个相同量子点组成的双量子点分子的电子结构 ,结果表明这种人造分子间的相互作用随两个量子点中心之间距离的变化可实现由共价键向离子键的转变 。

Non-covalent bond based self-assembly organic functional materials;

非共价键自组装有机功能材料

The development of photoluminescent materials was reviewed in thisdissertation, and we designed a novel non-covalent bond self-assembled “molecularduplex” with photoluminescent group.

本文综述了有机光致发光材料的研究现状,设计了一种新的非共价键自组装“分子双股”,通过酯基引入 1,8-萘酰亚胺发光片段对“分子双股”进行功能化。

Chemical bond mainly includes electrovalent bonds, covalent bonds, and metalic bonds.

化学键主要有离子键、共价键、金属键。

In covalent bonding, atoms share electrons.

在共价键联中，原子共有电子。

The atom that contributes no electrons to a covalent bond.

受体没有给共价键提供电子的原子

a covalent bond in which both electrons are provided by one of the atoms.

两个电子都由一个原子提供的共价键。

Several weak molecular interactions responsible for the maintenance of tertiary structure of proteins are covalent, ionic, hydrogen, and hydrophobic or hydrophilic bonds.

一些决定蛋白质三级结构的主要的弱分子作用力为共价键,离子键,氢键,疏水键和亲水键。

Both ionic and covalent bonds arise from the tendency of atoms to attain this stable configuration of electrons.

离子键和共价键都是由于原子要达到这个稳定电子构型而形成的。

Crystals may be classified as either ionic or covalent by analogy with molecules.

与分子的情况一样，晶体也可以分为离子键型和共价键型。

The attraction between covalent bonds molecules is the interaction of electrical dipole moment.

共价键分子间的吸引力是电偶极矩的相互作用。

Further study is needed before the origin of the covalent bond can be considered a settled question.

需进一步深入研究方能解决共价键的起源问题。

Covalent Functionalization of Silica and Carbon Nanotubes with Polyamide 6;

聚酰胺6共价键修饰二氧化硅及碳纳米管研究

Covalent bond A chemical bond in which one or more pairs of electrons are shared between two atoms.

共价键：一般指两个原子接合时，通过形成共有电子对而产生的化学键。

a substance that provides a pair of electrons for a covalent bond with an acid.

能够提供一对电子给一个酸形成共价键的化合物。

A molecule or ion that can combine with another by forming a covalent bond with two electrons of the other.

分子，离子可通过两个电子形成共价键而结合在一块的分子或离子

To join(adjacent chains of a polymer or protein) by creating covalent bonds.

联接通过形成共价键来联接（聚合物或蛋白质的相邻链）

Review on Acceptability of Scientific Theory--Study about the Accepted Fact of Covalent-Bond Theory

科学理论可接受性评说——共价键理论接受的案例研究

Ceramics primarily have ionic bonds, but covalent bonding is also present.

陶瓷初始状态是受离子束缚的，但是还是有共价键结构的。

Synthesis and Controlling of Covalent Bonded PMMA/CaCO_3/SiO_2 Composite Particles;

基于共价键结合的PMMA/CaCO_3/SiO_2三元复合粒子的制备和调控

Construction of Luminescent Rare Earth Covalently Bonded Hybrid Materials by Modifying Bridged Molecules;

修饰桥分子来构筑共价键合的稀土杂化发光材料