% Chirp Echo FT EPR-detected NMR % % 11/2017 Nino Wili: nino.wili@phys.chem.ethz.ch % EPR @ ETH Zurich % Plot of conventional EDNMR spectrum of nitroxide clear, close all; %load data with function tailored to our AWG spectrometer options.plot = 0; % 0 for do not plot by uwb_eval options.evlen = 2800; % length of evaluation window in points data=uwb_eval('20170831_1636_fstep_EDNMR',options); %extract needed data from struct f_HTA=data.dta_x{1}; %frequency axis of HTA pulse spc=real(data.dta_ev); %averaged and integrated echo transients %calculate ednmr spectrum and frequency axis f_ednmr=f_HTA-data.exp.events{end}.det_frq; ednmr=1-(spc/max(spc)); ednmr=ednmr/max(ednmr); %caluclate filtered ednmr_spectrum ednmr_filt = ifftshift(ifft(ednmr)) ; window=chebwin(numel(ednmr_filt))'; ednmr_filt=window.*ednmr_filt; ednmr_filt=(fft(fftshift(ednmr_filt))); plot(real(ednmr_filt)) %% %Plot h=figure(1); clf; %plot spectrum plot(1e3*f_ednmr,ednmr,'k','linewidth',2) %make nicer h=niwi_niceplot(h,[15 8]); box off hold on %plot zoom plot(1e3*f_ednmr,ednmr*6+0.2,'k','linewidth',1) %plot zoom plot(1e3*f_ednmr,ednmr_filt*6+0.8,'r','linewidth',1) %annotations and changes of figure appearance text(-78,0.7,'x6') text(-82,1.4,'{\color{red} filtered}') text(-54,1.95,'$^{1}$H','Horizontalalignment','center','verticalalignment','bottom') text(52,1.95,'$^{1}$H','Horizontalalignment','center','verticalalignment','bottom') text(-32,1.5,'$^{14}$N','Horizontalalignment','left','verticalalignment','bottom') text(23,1.7,'$^{14}$N','Horizontalalignment','left','verticalalignment','bottom') text(41,1.24,'*','Horizontalalignment','left','verticalalignment','bottom') text(70,1.15,'*','Horizontalalignment','left','verticalalignment','bottom') %adjust figure xlabel('$( \nu_{\\text{HTA}}-\\nu )$ / MHz') ylabel('EDNMR Intensity / a.u.') set(gca,'Ytick',[]) axis([-85 85 -0.04 1.94]) set(findall(h,'-property','Fontsize'),'Fontsize',12); % change fontsize %Only needed for integration with Latex % niwi_Plot2LaTex(h,'chirp_ednmr_vs_classical_classical');