???????CoC2

1
???????CoC2

• -?????????????-

???????? ?? ??,? ??
2
?????????????

• ?????(??,?????)
• ?????????3???
• ??????????(??????)
• ??????(??????,??????)
• ?????????????????
• ????????,????????
• (?????)

3

• ???????
• ??????
• ?????????????
• ??,??????????
• ????????????????????

?
??(???????)??????????????????,????????????????????
??.
4
??????????????

• ????????????
• ????????????????,
• ????????????????.

???
p???????????(????????) (????)????????? ????????
????????????
5
????????C22?
??????????,?????C2?????????????????????
cf. Ti8C12 Science, 255 (1992) 1411 Phys. Chem.
Chem. Phys., 3 (2001) 5130
C22?????????????
??????????????, ???????????????????
6
Contents 1. CoC2????????? 2. CoC2???
???,??? 3. CoC2??? ???,??? 4. ??????????
7
1. CoC2?????????
8
????????????

• ??????????????? (???)
• Cu2C2,Ag2C2,Au2C2???????
• 2CuCl / NH3aq C2H2 ? Cu2C2 2NH4Cl

??????Co?Ni??????????? CoCl2 / NH3aq C2H2 ?
CoC2 2NH4Cl?
CoC2???????????????
9
CoC2???
???????????????????? CoCl2 CaC2 ? CoC2
CaCl2 (???????,78 ?,140h)
??CoC2????,???????? ??,??????????
10
???????
????? ????
??? (?????????)
??? (???)
?????????????????! ??,??????????????
11
2. CoC2???

• ???????????????????
• ?????,??????????????
• ??
• ???????????
• ? ???????????????X?
• ???????????X?
• ?????????????EXAFS

12
??CoC2???
?????? C22?????disorder ???? ??????(gt50 nm)
13
??CoC2???(EXAFS)
1?????????? 4.82 Å ? 3.36 Å ????????? 3.41 Å
? 3.85 Å Co???????????
14
??CoC2???(XRD)
?????? C22??a1a2????? ???? ??????(10 nm)
15
?????????????

• ?????

C22???????
?????????,??????????
16
CaC2???
1st layer
2nd layer
???????????
cf. ???????
17
MgC2???
1st layer
2nd layer
??????????????
cf. ???????
18
C22????????????
1st layer
2nd layer
???
???????????????
cf. ???????
19
????????????
???C22?????Disorder ?
Co2???????????? Co2???????(fcc)
???C22????????????Order
Co2?C22??Co2?1?????? ?
?????????????? ?????????????????
H2O
??
H2O
??
20
3. CoC2???
C22???????????????????? ???????????????????

• ??????????????????????
• ???,????10,30,60?,2???????????(FC,ZFC),???????

21
?????????(???)
??????????
22
?????????(????)
?????????????????
23
?????????(?T -T )
Curie??(emu K / mol) ???1.7(AS) 2.8
(60 min) Co2(S1/2)0.375
?????????????? C22????????????? (???????)
Co2???????????, ?????????????. ??????????
??????????? ?????????? ??????????
??????????????????!
24
?????????????????

• ?????,95 ?,48?????????
• ?0.11?????MeOH?????????
• ???????????????????

????
????
25
???????????
??????
???????????? ??????????, ??????????
?????????C22???????? ?????????
26
4. ??????????
27
???????J ???
??????????? DFT, B3LYP, 6-311G(d,p)
28
???????????????????
???????
???????

• ??,?????????????????
• Co2d7,6????d x2-y2 (???)

29

• ?????????,C22?????order
• ???????????,???????

???
????????????
30
???

• CoC2 ????????????????
• ? ??????,??????
• ???C22?????Disorder
• ????????? ? ????
• ?????????????????C22??
• ???,?????Order
• ????????? ? ???

?????????? ???????????????????
??????????????????? ???????????? ?????????????
31
?????

• ??????????????????
• FeC2,MnC2????,??????
• NiC2???????????
• ???????????
• (CoC2????????????)
• ??????????????
• H2,CH4,NH3,H2S
• ??,??????????

32
??
CoC2??? ?? ??? M. Junaid Bushiri ??
?? EXAFS??? ?? ??(???) ?? ??? ?????????XRD
? ? (???)