In this paper,we report the photoionization and photodissociative ionization processes of azobenzene(PHAB) using vacuum ultraviolet synchrotron radiation(SR) photoionization mass spectroscopy.The ionization potential(...In this paper,we report the photoionization and photodissociative ionization processes of azobenzene(PHAB) using vacuum ultraviolet synchrotron radiation(SR) photoionization mass spectroscopy.The ionization potential(IP) of the PHAB molecular and the apparant potential(AP) of the main ionic fragments from the SR photodissociative ionization of PHAB have been measured.On the basis of IP(C 12 H 10 N 2O) and AP measured in this experiment,dissociative energy D 0(OHC 6H 4N 2-C 6H 5),D 0(OHC 6H 4N 2-C 6H + 5),D 0(OHC 6H 4N + 2-C 6H 5),D 0(OHC 6H 4-N 2C 6H 5),D 0(OHC 6H 4-N 2C 6H + 5) and IP(C 6H 4N 2O) have been evaluated.Based on the results of the mass spectroscopy of PHAB,possible channel of the photodissociative ionization of PHAB was analyzed.展开更多
在室温下,以对氯邻硝基苯胺邻叔丁基对甲基苯酚和亚硝酸钠为原料通过固相重氮偶合反应一步合成了2-硝基-4-氯-2′-羟基-3′-特丁基-5′-甲基偶氮苯。反应时间15 m in,产率达93%。以HPLC分析,其纯度>99%,并用IR和UV光谱等对其结构进...在室温下,以对氯邻硝基苯胺邻叔丁基对甲基苯酚和亚硝酸钠为原料通过固相重氮偶合反应一步合成了2-硝基-4-氯-2′-羟基-3′-特丁基-5′-甲基偶氮苯。反应时间15 m in,产率达93%。以HPLC分析,其纯度>99%,并用IR和UV光谱等对其结构进行了表征和确认。展开更多
The interaction of O {2 [ α (2 hydroxy 5 sulphophenylazo)benzylidene]hydrazino}benzoic acid(ZCN) with cetyl trimethyl ammonium bromide(CTAB) was studied by UV spectra in pH=5 0 buffered solution. The results showed t...The interaction of O {2 [ α (2 hydroxy 5 sulphophenylazo)benzylidene]hydrazino}benzoic acid(ZCN) with cetyl trimethyl ammonium bromide(CTAB) was studied by UV spectra in pH=5 0 buffered solution. The results showed the complex has maximum absorption at 540 and 570 nm with an apparent molar absorptivity of 2 0×10 4 L/(mol·cm). Three constants were determined: binding constant K =2 3×10 5; degree of dissociation α =0 03 and binding number n (CTAB)∶ n (ZCN)=1∶2 5.展开更多
In the presence of Triton X100,the color reaction of Mercury(Ⅱ)with 2hydroxy5nitrophenyldiazoaminoazobenene(HNPDAAB)was studied.Mercury(Ⅱ)reacts with HNPDAAB and forms a 1∶1 red complex at pH=95-110 buffer solution...In the presence of Triton X100,the color reaction of Mercury(Ⅱ)with 2hydroxy5nitrophenyldiazoaminoazobenene(HNPDAAB)was studied.Mercury(Ⅱ)reacts with HNPDAAB and forms a 1∶1 red complex at pH=95-110 buffer solution of Na2B4O7NaOH.The molar absorptivity is 256×105L·mol-1·cm-1.Beer’s law is obeyed in the concentration range of 0～12μg/25mL for Mercury(Ⅱ).The results are in agreement with those determined by the conventional method.This new method was used to determine trace mercury in wastewater.展开更多
文摘In this paper,we report the photoionization and photodissociative ionization processes of azobenzene(PHAB) using vacuum ultraviolet synchrotron radiation(SR) photoionization mass spectroscopy.The ionization potential(IP) of the PHAB molecular and the apparant potential(AP) of the main ionic fragments from the SR photodissociative ionization of PHAB have been measured.On the basis of IP(C 12 H 10 N 2O) and AP measured in this experiment,dissociative energy D 0(OHC 6H 4N 2-C 6H 5),D 0(OHC 6H 4N 2-C 6H + 5),D 0(OHC 6H 4N + 2-C 6H 5),D 0(OHC 6H 4-N 2C 6H 5),D 0(OHC 6H 4-N 2C 6H + 5) and IP(C 6H 4N 2O) have been evaluated.Based on the results of the mass spectroscopy of PHAB,possible channel of the photodissociative ionization of PHAB was analyzed.
文摘The interaction of O {2 [ α (2 hydroxy 5 sulphophenylazo)benzylidene]hydrazino}benzoic acid(ZCN) with cetyl trimethyl ammonium bromide(CTAB) was studied by UV spectra in pH=5 0 buffered solution. The results showed the complex has maximum absorption at 540 and 570 nm with an apparent molar absorptivity of 2 0×10 4 L/(mol·cm). Three constants were determined: binding constant K =2 3×10 5; degree of dissociation α =0 03 and binding number n (CTAB)∶ n (ZCN)=1∶2 5.
文摘In the presence of Triton X100,the color reaction of Mercury(Ⅱ)with 2hydroxy5nitrophenyldiazoaminoazobenene(HNPDAAB)was studied.Mercury(Ⅱ)reacts with HNPDAAB and forms a 1∶1 red complex at pH=95-110 buffer solution of Na2B4O7NaOH.The molar absorptivity is 256×105L·mol-1·cm-1.Beer’s law is obeyed in the concentration range of 0～12μg/25mL for Mercury(Ⅱ).The results are in agreement with those determined by the conventional method.This new method was used to determine trace mercury in wastewater.
