摩熵化学
数据库官网
小程序
打开微信扫一扫
首页 分子通 化学资讯 化学百科 反应查询 关于我们
请输入关键词

hydroxyapatite

中文名称
——
中文别名
——
英文名称
hydroxyapatite
英文别名
HAp;hydroxylapatite;calcium hydroxyapatite;calcium;hydroxide;phosphate
hydroxyapatite化学式
CAS
——
化学式
5Ca*HO*3O4P
mdl
——
分子量
502.311
InChiKey
HUSUHZRVLBSGBO-UHFFFAOYSA-J
BEILSTEIN
——
EINECS
——
  • 物化性质
  • 计算性质
  • ADMET
  • 安全信息
  • SDS
  • 制备方法与用途
  • 上下游信息
  • 反应信息
  • 文献信息
  • 表征谱图
  • 同类化合物
  • 相关功能分类
  • 相关结构分类

计算性质

  • 辛醇/水分配系数(LogP):
    -3.38
  • 重原子数:
    7.0
  • 可旋转键数:
    0.0
  • 环数:
    0.0
  • sp3杂化的碳原子比例:
    0.0
  • 拓扑面积:
    116.25
  • 氢给体数:
    0.0
  • 氢受体数:
    5.0

反应信息

  • 作为反应物:
    描述:
    hydroxyapatite 以 neat (no solvent) 为溶剂, 生成 tricalcium diphosphate
    参考文献:
    名称:
    Preparation and antimicrobial activity of the porous hydroxyapatite nanoceramics
    摘要:
    Calcium hydroxyapatite porous nanoceramics (ncHAP) were prepared in the form of granules utilizing raw, high purity HAP nanopowder and methylcellulose (MC) in ratio of 60/40 wt% with the final moulding at high temperature (800-1000 degrees C). The ncHAP's were studied by means of XRD, TEM, SEM techniques for structural and morphological characterizations. BET method was used in order to estimate the surface area, pore diameter and volume as well as the average particle size. It was found that particle size of raw material and nanoceramic prior heating (with MC) was 33 nm whereas ncHAP's size has significantly increased with sintering temperature from 136 nm up to 955 nm. X-ray diffraction clearly showed that all materials were crystallized and under given process parameters the HAP underwent dehydratation event as the content of b-TCP (tricalcium phosphate) has increased along with temperature up to 24%. The presence of b-TCP in porous nanoceramic material, might be advantageous since both phosphates have different solubility in biological media thus it is possible to affect the resorption speed. The antimicrobial activity of raw materials and nanoceramics against Pseudomonas aeruginosa as a representative of the Gram-negative bacteria has been determined in vitro and in vivo on Galleria mellonella larvae model. The results confirm that definitely nanobased biomaterials of calcium hydroxyapatite are very promising compound with high potential in biomedical applications. (C) 2018 Elsevier B.V. All rights reserved.
    DOI:
    10.1016/j.jallcom.2018.03.162
  • 作为产物:
    描述:
    calcium hydrogen phosphate 作用下, 反应 10.0h, 生成 hydroxyapatite
    参考文献:
    名称:
    温和条件下羟基磷灰石纳米棒的合成及其释药性能
    摘要:
    羟基磷灰石(HAp)纳米棒在各个领域都有广阔的应用前景,这里高纵横比的HAp纳米棒是通过在60°C的大气压下方便的两步沉淀水解过程合成的。CaHPO 4的前驱物在沉淀阶段以CTAB为表面活性剂充分结晶为块状形态,而在水解阶段CaHPO 4溶解且CTA +稳定了HAp核。OH -离子被吸收到有源晶体表面,其中的Ca 2+和PO 4 3+与OH反应-使核生长成更大的晶体,并通过奥斯特瓦尔德(Ostwald)成熟获得了高度结晶的HAp纳米棒。HAp晶体上负载的IBU药物可在24小时内100%释放。与纯HAp纳米棒相比,PVP修饰的HAp纳米棒可以增加载药量并更快地释放药物。结果表明,用合适的表面活性剂改性的HAp纳米棒在药物递送系统中具有很大的用途。
    DOI:
    10.1002/cjoc.201500343
  • 作为试剂:
    描述:
    吲哚啉hydroxyapatite 、 lithium aluminium tetrahydride 、 Pd(PhCN)2Cl2溶剂黄146 作用下, 以 四氢呋喃甲苯 为溶剂, 反应 14.0h, 生成 利扎曲坦
    参考文献:
    名称:
    一种苯甲酸利扎曲坦制备方法
    摘要:
    本发明公开了一种新的苯甲酸利扎曲坦的制备方法。该制备方法以吲哚啉为起始原料,经过三氮唑甲基化,脱氢,上侧链,还原,成盐五步反应,得到苯甲酸利扎曲坦。该方法的创新之处在于采用了一种全新的方法构建吲哚环,避免了现有路线中使用的fisher吲哚合成法而带来的产品杂质含量高,难于纯化的缺点。该方法的优点为:操作简便,反应条件温和,无昂贵试剂,产品纯度高。
    公开号:
    CN103664901B
点击查看最新优质反应信息

文献信息

  • Is water a suitable solvent for the catalytic amination of alcohols?
    作者:Johannes Niemeier、Rebecca V. Engel、Marcus Rose
    DOI:10.1039/c7gc00422b
    日期:——
    energetic reasons by avoiding the initial water separation. Herein, we report the amination of biogenic alcohols in aqueous solutions using solid Ru-based catalysts and ammonia as a reactant. The influence of different support materials and bimetallic catalysts is investigated for the amination of isomannide as a biogenic diol. Most importantly, the transferability of the reaction conditions to various
    生物质和生物平台化学品的催化转化通常需要使用溶剂。原料中已经存在,并且在大多数情况下,是典型的高极性基材的合适溶剂。因此,开发新的用于进一步处理的催化路线将得益于相中反应条件的优化,这主要是出于能源方面的原因,它避免了最初的分离。在本文中,我们报道了使用固体Ru基催化剂和作为反应物的溶液中生物醇的胺化反应。研究了不同载体材料和双属催化剂对异甘露聚糖作为生物二醇的胺化的影响。最重要的是,已成功证明了反应条件向各种其他伯醇和仲醇的转移性。因此,似乎是可持续生产生物胺的合适溶剂,并为进一步的工艺开发提供了巨大的潜力。
  • Aerobic oxidative transformation of primary alcohols and amines to amides promoted by a hydroxyapatite-supported gold catalyst in water
    作者:Wentao Wang、Yu Cong、Leilei Zhang、Yanqiang Huang、Xiaodong Wang、Tao Zhang
    DOI:10.1016/j.tetlet.2013.10.133
    日期:2014.1
    In the presence of an easily prepared hydroxyapatite-supported gold catalyst, namely Au/HAP, various kinds of structurally diverse primary alcohols including benzylic and aliphatic ones, and amines involving aromatic and secondary ones could be converted into the corresponding amides in water with up to 99% yield. Meanwhile, on the basis of experimental observations and literatures, a plausible reaction
    在易于制备的羟基磷灰石负载的催化剂(即Au / HAP)的存在下,中最多可将各种结构不同的伯醇(包括苄基和脂族醇)以及涉及芳族和仲醇的胺转化为相应的酰胺。产率99%。同时,在实验观察和文献的基础上,描述了合理的反应途径以阐明反应机理。
  • Selective Hydrogenation of Nitroarenes and Olefins over Rhodium Nanoparticles on Hydroxyapatite
    作者:Lei Huang、Pingfei Luo、Weige Pei、Xiaoyun Liu、Yong Wang、Jun Wang、Weihong Xing、Jun Huang
    DOI:10.1002/adsc.201200330
    日期:2012.10.8
    have demonstrated a highly active and selective nanocatalyst, Rh/HAP (rhodium supported on hydroxyapatite), for the reduction of nitroarenes with hydrazine and for the hydrogenation of olefins with hydrogen gas under mild conditions. Nitroarenes were hydrogenated selectively to the corresponding anilines over the Rh/HAP catalyst with hydrazine as reducing agent, and reducible groups, such as halides
    我们已经展示了一种高活性和选择性的纳米催化剂Rh / HAP(负载在羟基磷灰石上的),用于在的条件下用还原硝基芳烃,以及在温和条件下用氢气将烯烃氢化。用作为还原剂,在Rh / HAP催化剂上,将硝基芳烃选择性地氢化成相应的苯胺,并还原未还原的基团,如卤化物(),基和烯烃。而且,当使用H 2时,在存在可还原的硝基,羰基和基的情况下,在Rh / HAP催化剂上,烯烃可以高产率选择性地氢化成相应的烷烃
  • Selective Oxidation of Methanol to Formaldehyde Over Active Molybdenum Oxide Supported on Hydroxyapatite Catalysts
    作者:Abd El-Aziz A. Said、Mohamed M. M. Abd El-Wahab、Alian M. Alian
    DOI:10.1007/s10562-015-1624-2
    日期:2016.1
    pyridine (PY) and 2,6-dimethyl pyridine (DMPY). The gas–phase oxidation of methanol to formaldehyde was carried out in a conventional fixed-bed flow type reactor using N2 as a carrier gas. The obtained results clearly revealed that HAP–MoO3 systems were active and selective towards the formation of formaldehyde. The maximum yield of formaldehyde (97 %) was achieved on the catalyst containing 5 wt% MoO3/HAP
    羟基磷灰石(HAP)是通过溶胶-凝胶法合成的。通过浸渍法制备了负载在 HAP 上的不同比例的氧化钼 (1-15% w/w) 并在静态空气气氛中在 400°C 下煅烧。通过热重分析、差热分析、X 射线衍射、FTIR 光谱和氮吸附测量对催化剂进行表征。通过异丙醇的脱吡啶(PY)和2,6-二甲基吡啶(DMPY)的吸附来研究催化剂的表面酸性。甲醇气相氧化制甲醛是在传统的固定床流动型反应器中以 N2 作为载气进行的。所得结果清楚地表明,HAP-MoO3 系统对甲醛的形成具有活性和选择性。在含有 5 wt% MoO3/HAP 的催化剂上实现了最大的甲醛收率 (97%)。Mo6+作为Lewis 和Brønsted 酸位点的生成在甲醛的形成中起主要作用。图形摘要MoO3/HAP 催化氧化甲醇在400 °C 下煅烧4 小时。
  • The mechanism and kinetics of methyl isobutyl ketone synthesis from acetone over ion-exchanged hydroxyapatite
    作者:Christopher R. Ho、Steven Zheng、Sankaranarayanapillai Shylesh、Alexis T. Bell
    DOI:10.1016/j.jcat.2018.07.005
    日期:2018.9
    The synthesis of methyl isobutyl ketone (MIBK) can be carried out by the condensation of acetone in the presence of hydrogen over a supported metal catalyst. Previous studies have shown that hydroxyapatite is an excellent catalyst for condensation reactions. The present investigation was undertaken in order to elucidate the reaction mechanism and site requirements for acetone coupling to MIBK over
    甲基异丁基酮(MIBK)的合成可以通过在氢存在下,在载体属催化剂上的丙酮缩合来进行。先前的研究表明,羟基磷灰石是一种出色的缩合反应催化剂。进行本研究是为了阐明在羟基磷灰石和Pd / SiO 2的物理混合物上丙酮与MIBK偶联的反应机理和位置要求。发现该反应通过连续的羟醛加成以形成双丙酮醇(DAA),DAA异氰酸酯(MO)以及MO氢化成MIBK来进行。通过进料DAA和MO形成的产物表明,丙酮的羟醛加成快速且可逆,并且随后DAA的脱是限速的。吡啶和CO 2滴定表明,羟醛脱通过E 1cB机制在碱性位点发生。通过离子交换制备了一系列阳离子取代的羟基磷灰石样品,以进一步研究酸碱强度对催化剂性能的作用。通过PXRD,BET,ICP-OES,XPS,CO 2 -TPD和拉曼光谱对这些样品进行表征,表明所用的交换程序不会影响羟基磷灰石的整体性质。DFT计算表明,阳离子的大小除了影响载体的路易斯
查看更多