Table 1 The synthesis of formamidine (FA0) and chemical reactions between FA0/amines/NH3 gases and FAI salt

From: Ammonia for post-healing of formamidinium-based Perovskite films

No.

Gas generation

Gas collection

Producta

1

FACl, NaOH, RT

DMSO-d6

NH3

2

FACl, NaOH, 150 °C

DMSO-d6

s-triazine, formamide, FA, NH3

3

FACl, NaOH, 150 °C

HOAc

FAAcb

4

FACl, NaOH, 150 °C

FAI powder

FAI, formamideb

5

MA in EtOH, 60 °C

FAI powder

DMFAIb

6

EACl, NaOH, 60 °C

FAI powder

DEFAIb

7

PA, 60 °C

FAI powder

DPFAIb

8

BA, 60 C

FAI powder

DBFAIb

9

NH3·H2O, 60 °C

FAI powder

NH4Ib

10

MA in H2O, 60 °C

FAI powder

MAIb

11

EA in H2O, 60 °C

FAI powder

EAIb

12

H2O, 60 °C

FAI powder

FAIb

13

NH3, RT

FAI powder

FAIb

  1. a The main components are listed.
  2. b The samples are treated with vacuum to remove low boiling point components before 1H NMR measurement. FACl is formamidine hydrochloride, FA is formamidine, HOAc is acetic acid, FAAc is formamidinium acetic, FAI is formamidinium iodide, MA is methylamine, EtOH is ethyl alcohol, DMFAI is N,N’-dimethyl formamidinium iodide, EACl is ethylamine hydrochloride, DEFAI is N,N’- diethyl formamidinium iodide, PA is n-Propylamine, DPFAI is N,N’- dipropyl formamidinium iodide, BA is n-Butylamine, DBFAI is N,N’- dibutyl formamidinium iodide. MAI is methylaminium iodide, and EAI is ethylamine hydroiodide.
Back to article page