Self-assembled Transition Metal Coordination Frameworks of ...

Manganese(II) complexes
MALDI MS spectra of the carbohydrazone complexes are found to be
fragmented extensively under ionization conditions compared to thiocarbohydrazone
complexes. The complex 21 shows peaks centered at m/z 1021.l843, 983.2309,
898.2527, 883.2750, 785.1430, 685.1847, 674.1828, 561.0714, 476.0900, 445.1490,
etc. The peaks at 983.2309, 898.2527, 883.2750, 685.1847, 674.1828 and 561.0714
are found characteristic and assigned as [Mn2(HL4)L4- CH3OH]+ (calc. 983),
[Mn(HL")H2L4]* (calc. 898), [Mn(HL4)(H2L4-O)]+ (calc. 882), [Mn(di-2-pyridyl
ketone hydrazone)3- 2H2O-H+]+ (calc. 684), [Mn(HL4)(di-2-pyridyl ketone
°' ii
hydrazone)]+ (calc. 674) and [Mn(H2L4-O)ClO4]+ (calc. 560) with agreeing calculated
isotropic patterns ( Fig. 5.5). The peak
on
at 476.09 is
8
assigned
»
as [Mn(HL4)]+ (calc. 476).
ass
_
"2ii
ll
5“ as ,1 it $04 A ea: 8” 5
. 8 ; 67$ 38$ jgI
__ 4451490
“" so @ *2 ManICl'uu'p i an an 1 as F 8°‘
°°‘
-»-
Q—
1 ‘L S“ 1as
m ,,, Mwfclwa 983.2309
.
M”"°""""
'°' '°- 1 MauJCharp 1'»!-=r¢hw= U8 =99 .19
9 9
561.0714
I­
;\ 685.1847 A
888
'3
883.2750 .§
I-r
°__ . . .
1|1|v[vIvu| v I I I I |||'rIII|||||| nu‘ II‘IIII ' I||I|||||||||||1I|I II||||||I|vI ||||1|| I ||r 1] It! ]IIII|||v||IIII| I I I
..§ 4-160900 '“-'"' ' 898.2527 M""C"”"'
I an“ mm. mu’ _‘“ mm: 7,_,¢:“:“. an“, mama unuua “"u"'"°“7”
1 i | n .81 II 1 ['1'\"Ta. ,m ‘IL 1 Ir ml I Yuri U1“ ‘a fl m
Fig. 5.5. MALDI MS spectrum of complex 21. The insets are calculated isotropic
pattems of relevant peaks.
205