应《网络安全法》要求，自2017年10月1日起，未进行实名认证将不得使用互联网跟帖服务。为保障您的帐号能够正常使用，请尽快对帐号进行手机号验证，感谢您的理解与支持！

24小时热门版块排行榜    

小木虫论坛-学术科研互动平台 » 化学化工区 » 催化 » 催化动态 » [Nature]催化合成氨获研究进展
71/1返回列表
查看: 1968  |  回复: 6
只看楼主 @他人 存档 新回复提醒 (忽略) 收藏    在APP中查看

leiws

至尊木虫 (职业作家)

木虫浪子

[交流] [Nature]催化合成氨获研究进展 已有6人参与

Title: Catalytic conversion of nitrogen to ammonia by an iron model complex
Abstract:
The reduction of nitrogen (N2) to ammonia (NH3) is a requisite transformation for life1. Although it is widely appreciated that the iron-rich cofactors of nitrogenase enzymes facilitate this transformation, how they do so remains poorly understood. A central element of debate has been the exact site or sites of N2 coordination and reduction. In synthetic inorganic chemistry, an early emphasis was placed on molybdenum8 because it was thought to be an essential element of nitrogenases3 and because it had been established that well-defined molybdenum model complexes could mediate the stoichiometric conversion of N2 to NH3 (ref. 9). This chemical transformation can be performed in a catalytic fashion by two well-defined molecular systems that feature molybdenum centres. However, it is now thought that iron is the only transition metal essential to all nitrogenases3, and recent biochemical and spectroscopic data have implicated iron instead of molybdenum as the site of N2 binding in the FeMo-cofactor. Here we describe a tris(phosphine)borane-supported iron complex that catalyses the reduction of N2 to NH3 under mild conditions, and in which more than 40 per cent of the proton and reducing equivalents are delivered to N2. Our results indicate that a single iron site may be capable of stabilizing the various NxHy intermediates generated during catalytic NH3 formation. Geometric tunability at iron imparted by a flexible iron–boron interaction in our model system seems to be important for efficient catalysis. We propose that the interstitial carbon atom recently assigned in the nitrogenase cofactor may have a similar role, perhaps by enabling a single iron site to mediate the enzymatic catalysis through a flexible iron–carbon interaction.
全文地址：
http://www.nature.com/nature/jou ... ll/nature12435.html[Nature]催化合成氨获研究进展
nature12435-f1.jpg
回复此楼

» 本帖附件资源列表

  • 欢迎监督和反馈：小木虫仅提供交流平台，不对该内容负责。
    本内容由用户自主发布，如果其内容涉及到知识产权问题，其责任在于用户本人，如对版权有异议，请联系邮箱：xiaomuchong@tal.com
  • 附件 1 : nature12435.pdf
    • 2013-09-05 10:02:55, 406.38 K

» 收录本帖的淘帖专辑推荐

那些事

» 本帖已获得的红花（最新10朵）

zyhou jiangyun2

» 猜你喜欢

» 本主题相关价值贴推荐，对您同样有帮助:
人的烦恼就是记性太好，如果可以把所有事都忘掉，以后每一日都是个新开始，你说多好。
1楼 2013-09-05 10:03:28
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

zyhou

专家顾问 (文坛精英)
送红花一朵
谢谢分享！
学习一下！
回复此楼
2楼2013-09-05 10:19:04
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

豆豆要科研

新虫 (初入文坛)
谢谢分享！好厉害！
回复此楼
3楼2013-09-06 20:46:10
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

jiangyun2

荣誉版主 (文坛精英)

小鱼儿

优秀版主文献杰出贡献优秀版主
送红花一朵
谢谢分享
欢迎常来催化版
回复此楼
一天到晚游泳的鱼啊，鱼不停游~
4楼2013-09-06 21:37:09
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

林夕08

金虫 (小有名气)
值得学习下
回复此楼
5楼2013-09-06 22:39:03
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

jaej_hero

金虫 (小有名气)
太好了
回复此楼
做一个有贡献的人
6楼2013-12-01 21:25:14
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

690819
感谢分享！

[ 发自小木虫客户端 ]
7楼2013-12-02 08:20:52
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
相关版块跳转 我要订阅楼主 leiws 的主题更新
71/1返回列表
普通表情 龙 兔 虎 猫 高级回复 (可上传附件)
信息提示
关闭
请填处理意见
关闭