查询词典 ir

The above-mentioned T8 glass-ceramic showed only 25 % decrease in IR transmittance, 17 % increase in hardness, 61 increase in dilatometric softening point, and 19 % increase in Young s modulus.

上述试片之IR穿透率与T8起始玻璃比较，仅下降了25 %，但硬度上升了17%；与未添加成核剂的玻璃比较，膨胀仪软化点上升约61℃，杨氏系数上升约19 %。

In this paper, a series of thermal stable PTC based on dimethylamino pyridinium salts were synthesized and characterized by 〓HNMR, mp, IR, and MS.

由于4-二烷基氨基吡啶中供电子的二烷基与吡啶环共振，使正电荷分散于多个原子中，稳定性比吡啶增加。

Trifluoromethyl-3-heptadfluoroisopropyl-2-perfluoropentene-4-(N',N'-dimethylamino propyl) imino was prepared by the reaction of hexafluoropropene timer with N,N-dimethyl propanediamine in the molar ratio 1:1.0 at room temperature for 8h, and the structures of VIII were identified by IR and NMR spectra.

以六氟丙烯三聚体与N，N-二甲基丙二胺为原料合成叔胺2-三氟甲基-3-七氟异丙基-2-全氟戊烯-4-(N'，N'-二甲胺丙基)亚胺，利用红外光谱和核磁共振确定其结构，并通过对合成条件的考察得其最佳合成条件：乙醚为溶剂，碳酸钠为缚酸剂，摩尔投料比为1：1.0，在室温下反应8小时。

Three new chromophores and 4 nitro benzoic acid 2 {4 [2 (4 dimethylamino phenyl vinyl] phenyl} ethylamino ethyl ester have been synthesized and the structures have been characterized by 1H NMR, IR and elemental analyses.

作者中文名：延云兴；陶绪堂；杨家祥；王东；于晓强；赵显；蒋民华摘要：合成了反式-4-[N-(乙氧基羰基-4-硝基苯基)-N'-乙基氨基]-4'-二苯乙烯和三个新有机化合物。

The mineralogical characteristics of dioctahedral micas have been studied by chemical analysis, XRD, IR, DTA, SEM and IEM.

用化学分析、X射线衍射、红外光谱、差热和热重分析、扫描电镜及透射电镜等研究了白云母、绢云母和伊利石的基本矿物学特征。

A highly ordered copper phthalocyanine-3,4',4",4"'-tetrasulfonic acid, tetrasodium salt/4,4'-dipyridyl dihydrochloride nanotube array was successfully fabricated by the layer-by-layer self-assembly technique using micropore anodic aluminum oxide as templates. The assembly process of the nanotube array was investigated by UV-Vis spectrometry, XRD and FT-IR, and the morphology of the nanotubes was analyzed by scanning electron microscopy and transmission electron microscopy, respectively.

在阳极多孔氧化铝模板中利用层层自组装技术制备出了高度有序的聚电解质磺化酞菁铜/4，4′-联吡啶盐酸盐纳米管，并对其组装过程用UV-Vis， XRD和FT-IR进行了分析，纳米管的微观形貌通过SEM和TEM进行表征。

College of Chemistry and Molecular Sciences,Wuhan University,Wuhan 430072A novel diselenide porphyrins dimmers was synthesized using 5(4- hydroxylphenyl)-10,15,20- triphenyl porphyrin and selenium as raw materials. The structure of the novel porphyrin was confirmed by 1H NMR, IR, UV, and MS.

以5-(4-羟基苯基)-10，15，20-三苯基卟啉和硒粉为原料，合成了新型二硒双卟啉，用紫外可见光谱，红外光谱，核磁共振氢谱（1H NMR），高分辩质谱对目标产物的结构进行了确认。

B. Three novel dimeric dissymmetric chiral ligands and six chain binuclear Salen complexes were synthesized and characterized by FT-IR,〓HNMR, Elemental analyses, UV-vis, furthermore the CD spectra properties of the ligands and complexes were discussed in detail for the first time.

合成了三个未见报道的链式双Salen配体和六个链式双核Salen金属配合物，通过核磁共振波谱、元素分析、红外光谱、紫外-可见光谱进行了表征，并首次详讨论了手性配体及配合物的圆二色光谱性质。

The sulfonated diamine, 4,4'-bis(3-aminophenoxy)biphenyl-3,3'-disulfonic acid, was successfully synthesized and characterized by FT-IR and 1H NMR spectra.

合成了4，4'-二联苯-3，3'-二磺酸单体，采用红外光谱和核磁共振等方法对其结构进行了表征。

The results show that the introducing of multivinyl monomer and CaCO3 can slow down polymerization rate to different extent.Using 1％～5％ trimethylolpropane trimetbacrylateor divinyl benzene,tight encapsulation of CaCO3 can be realized and beyond 94％PS cannot be extracted. The amount of crosslinker or emulsifier should be accommodated when the load amount of CaCO3 is increased.CaCO3 content in the product increases consequently with the increase of the loaded amount of CaCO3,which can be known from FT-IR and TGA.TEM observations reveal that when the load amount of CaCO3 is 14.8％,most CaCO3 particles are encapsulated and each latex particle contains one CaCO3 particle.Composite particles have well-defined core—shell structure and the thickness of polymer shells is around 10 nm.However,the thickness of polymer shell decreases and many free CaCO3 particles appear when the load amount of CaCO3 reaches 29.3％and 58.7％,respectively.

结果表明，多乙烯基单体以及碳酸钙的引入会使聚合反应速率有不同程度的降低；使用1%～5%的TMPTMA或DVB，可实现PS对碳酸钙颗粒的牢固包覆，不可抽提的PS达94%以上；当碳酸钙用量改变时，需要适当调整乳化剂和多乙烯基单体的用量；IR和TGA的结果表明，随着碳酸钙用量增加，产物中的碳酸钙含量也相应增加；TEM照片和计算结果显示，当碳酸钙用量为14.8%时，绝大部分碳酸钙颗粒被包覆，且基本上每个乳胶粒中包覆一个碳酸钙颗粒，复合粒子具有清晰的核壳结构，壳层厚度约为10 nm，而当碳酸钙用量增加到29.3%和58.7%时，壳层厚度减小，并且出现较多裸露的碳酸钙颗粒。

However it can often be frust ating for a child when people are unable to pronounce their name.

但它往往可以令人沮丧的一个孩子当人们无法断言他们的名字。

All these compounds were obtained from this genus for the first time. Compound, 4-cumylphenol, was a new nature product.

所有化合物均为首次从本属海藻中分离得到，其中4cumylphenol为新天然产物。